Vivienne Ashford had counted the walls of her cell four hundred times, and every wall was made of living wood. The fortress was not stone. It was a plant grown into a mansion, its rooms woven from thick vines and layered leaves. Her captor had locked her in a chamber high inside those green walls. He wanted her here until she gave him what he'd taken her for. She wanted only one thing: out. The door was a knot of braided roots. It had no hinge and no keyhole. Vivienne had tested every seam with her fingernails until they bled. The vines held tight. Above her, a small pet watched from a shelf grown into the wall. It had the soft face and round ears of a mouse, but its body bristled with spines, and its tail ended in a barbed point. Her captor's creature. It had never left her since the day the guards threw her in. Vivienne pulled the pen from the hem of her sleeve. The guards had searched her twice and missed it. They thought it was a writing tool. She pressed the clip, and the sleek body split open. A thin blade slid out, bright and sharp as a razor. She had smuggled it in for exactly this moment. She knelt at the base of the door and cut. The blade bit into the vine. Green sap welled up and ran over her hands. The wood was tough, and each cut took long, slow strokes. Her arm burned. The spined creature crept closer and sniffed the sap. Then the door began to close the wound. The severed vines curled toward each other and knit shut faster than she could cut. The mansion was alive. It was healing itself. Vivienne stopped. She stared at the little creature, then at the wet sap on her blade. The plant felt her cutting. But it did not seem to fear the pet. She held the blade out. The creature licked the sap, hissed, and lashed its barbed tail against the door in a temper. The spines tore the vine. Where the tail struck, the wood blackened and did not heal. Some venom in the barb poisoned the living wall. Vivienne understood. She could not cut this place. She had to wound it in a way it could not close. She scooped the creature up. It squirmed and jabbed her arm, but she held on and pressed its thrashing tail against the door's weakest seam. The barbs raked deep. The wood withered and split. She kicked. The rotted vines snapped, and the door tore open. Cold air rushed in from a corridor of hanging leaves. Vivienne stepped through, the pen-blade in one hand and the furious little beast tucked under her arm. She was out of the cell. Down the leafy hall, boots struck the floor, running toward her.

The boots grew louder. Vivienne pressed her back to the leafy wall and looked both ways down the corridor. Green vines hung like curtains, hiding every turn. She had no map. Any door could open onto her captor. She held the spined creature tight and made herself think. The pet twitched its whiskers and stared at a low arch to her left. Its round ears swiveled toward it. Vivienne felt the small body strain that way, pulling like a dog on a leash. It wanted something down that hall. She had no better guide. She followed the creature's nose. The arch led to a warm, bright room. Vivienne froze in the doorway. On a nest of moss sat a baby dragon. It was small enough to hold, with green scales and bright, curious eyes. It looked up at her and let out a puff of flame, no bigger than a candle. The spined creature squeaked and squirmed to reach it. The two beasts knew each other. Then Vivienne understood. Fire. The mansion was a living plant. The blade could not kill it. The barbed tail could poison it. But fire could burn it, and the walls could not grow back from ash. Boots pounded closer behind her. Voices called out. They had found the broken cell. Vivienne knelt by the dragon. "Please," she whispered. She pointed at the vine wall on the far side of the room. The little dragon tilted its head. It did not understand. She set the spined creature down. It scampered to the wall and clawed at the vines, hissing. The dragon watched its friend and grew excited. It opened its mouth and breathed a longer flame at the moving vines. The fire caught. Dry leaves crackled and curled black. The flame spread up the vine column faster than any blade cut. The living wood could not heal a burn. A hole opened in the wall, ringed with smoke, and cold night air poured through. Behind her, a guard shouted from the corridor. "In there! She's in there!" Vivienne scooped up both creatures, one under each arm. She ran to the burning gap and looked out. She saw open sky and the dark shapes of trees far below. She stood high in the fortress, higher than she'd known. There was no floor beneath the hole, only a long drop and a thick tangle of vines running down the outside wall. A hand grabbed the doorway behind her. Vivienne climbed into the smoking gap and gripped the outer vines. She lowered herself out of the room as the guard lunged. She hung on the outside of the living fortress now, halfway up its towering green wall. The guards could not reach her here. But her arms already shook, the drop yawned below, and she did not know if the vines would hold her all the way down.

Vivienne reached the ground and let go. Her feet hit soft moss and her knees buckled. She knelt in the dark, gasping. The two creatures squirmed free and dropped beside her. Her arms burned. Her hands were raw from the vines. Above her, the burning gap glowed orange, and shouts drifted down. The guards would find a way out. When they did, she had nothing to fight them with. She forced herself up and stumbled from the tree fortress. Its living walls loomed behind her, leaves black against the sky. The spined creature trotted ahead, then stopped. It stared at something in a clearing and flicked its ears. Vivienne followed its gaze. A sword stood upright in a cracked stone base. The blade glowed pale blue, and strange marks lined the stone in colored light. She had no idea who left it here. She only knew she was empty-handed, and a weapon sat within reach. She gripped the leather handle and pulled. The blade did not move. She braced a foot against the stone and heaved. Nothing. The sword held fast, as if grown into the rock. "Come on," she whispered. Her arms shook. She had climbed a wall and had nothing left. The blade only glowed at her, calm and useless. Behind her, the baby dragon padded to the stone. It sniffed the base and puffed a small flame at the colored marks. The light in the stone flared. A hum ran up the blade. Vivienne felt it through her palms. She understood. The stone answered fire, the same thing that had freed her from the walls. "Again," she told the dragon, and pointed. It breathed a longer flame across the base. The marks blazed bright. The stone cracked wider with a sharp snap. Vivienne pulled with everything she had. The blade slid free. She fell backward into the moss with the sword across her chest. It was lighter than it looked, and warm. She rose and swung it once. The edge cut clean through a hanging vine. She was armed now. Her legs still shook, but the weight in her hand steadied her. A gate groaned open at the base of the fortress. Torchlight spilled out. A tall figure stepped through, sword drawn, and scanned the dark. Not a guard. This one moved slow and sure, and the guards behind it hung back. Her captor had come out to hunt her. Vivienne pressed against a tree trunk and held her blade tight. The spined creature growled low. She would not be dragged back to a cell. She raised the glowing sword and watched the figure come.

The captor crossed the clearing with slow steps. His sword hung low and ready. Vivienne pressed her back to the tree trunk and watched the open ground behind him. He stood between her and escape. She had no rock to climb, no wall to guard her side. If she ran, he would cut her down. If she waited, he would reach her. The spined creature growled and slunk into the brush. The baby dragon huddled against her boot, its small flame flickering. Vivienne lifted the glowing blade. Her arms still shook from the climb. She knew how to hold a sword, but not how to use one. She had never trained a day in her life. "I wish I knew how to fight," she whispered. "I wish I could use this thing." The gems on the hilt flared bright. Heat ran up her arm and into her chest. The blade hummed the same note it had made in the stone. Her grip shifted on its own. Her feet slid apart into a stance she had never learned. The shaking stopped. Suddenly she knew the weight of the blade, the reach of it, the angle of every cut. The knowledge poured into her like water filling a cup. The captor lunged. His blade came down hard. Vivienne stepped aside without thinking. Her sword rose and met his with a bright clang. The shock ran down her arms, but her hands held firm. He swung again, fast, and she turned it away. Her body moved before her mind could doubt. She saw his next strike before he made it. He drove her back toward the tree. She let him think he had her. Then she twisted low and slashed across his leg. He grunted and stumbled. The gap between them opened. Open ground lay behind him now, clear and dark. He caught himself and charged, wild with anger. Vivienne ducked under his blade and drove her shoulder into his chest. He crashed into the stone base. His sword spun from his hand into the moss. He clutched his wounded leg and glared up at her. She stood over him, blade level with his throat. The dragon padded to her side and puffed a small flame. The spined creature crept from the brush, tail raised. "You will not take me back," she said. Behind him, torches bobbed at the fortress gate. The guards had found a way out. They spilled into the clearing and stopped when they saw their master on the ground. Vivienne counted six of them. Her captor was down, but she was not free. Six blades now stood between her and the dark tree line. She did not lower her sword. This time her hands did not shake. She backed toward the open ground, the dragon and the creature close beside her, and turned to face the coming line.

The six guards spread into a wide ring. Vivienne turned in place, her glowing blade tracking each one. Behind them, her wounded captor pushed to one knee. She could hold two, maybe three. Not six. Her back had no wall now, only open ground and the dark trees she could not reach. The dragon hissed at her boot. The spined creature crouched low, tail arched over its back. Vivienne remembered the barbs. She remembered what they did to the fortress. She glanced at the guards' armor and knew steel would not save them from that poison. "Now," she said. The spined creature sprang. Its tail whipped across the nearest guard's throat. He dropped without a sound. The others broke their ring and rushed the beast. Vivienne cut into the gap they left. Her blade took one man across the arm. He fell back, shouting. Then a new sound came from the fortress gate. Boots striking the ground in one rhythm. Not vines, not guards in cloth. A line of soldiers in black armor marched into the clearing. Blue lights glowed on their chestplates. At their head walked a woman with silver hair shaved close on one side. She did not draw a weapon. She raised one hand, and the line stopped. "Hold," she said. Her voice cut through the noise. The captor's guards froze. Vivienne did not lower her sword. She had never seen these soldiers before. They were not the plant fortress. They were something else, something worse. The silver-haired woman studied the bodies, then the beast, then Vivienne. "Colonel Kane," she said, as if the name settled everything. "You've cut down two of his men with a lizard and a house cat. That's more than his whole guard has managed." She looked at the wounded captor on his knees and did not hide her contempt. A broad man in heavier armor stepped up beside her. A scar cut across his brow. "We take her alive," he said. "Steele, form them up." His men fanned out with rifles Vivienne did not understand. Kane held up her hand again. "She's fast. Rush her and we lose three more." She looked at Vivienne with something close to interest. "The fortress wants you back in a cell. I have other uses for a woman who can fight like that." Vivienne understood then. These soldiers had not come to save her captor. They had come to take her for themselves. She backed toward the trees, dragon and creature at her heels. Kane let her move. "Run if you like," Kane called. "My men don't tire." Vivienne turned and ran into the dark. Branches tore at her arms. Behind her, the black line began to march, steady and slow, in no hurry at all. She had broken the ring of six. But she had traded one captor for a hunter who would never stop.

Vivienne ran straight through the trees, and the plan began to fail. Voices rose to her left, then to her right. Kane's soldiers were not chasing her back. They were spreading wide, calling out in the same flat rhythm, closing like a net. If she held this line, they would meet ahead of her and box her in. The dragon flew low at her shoulder. The spined creature kept pace on the ground. Vivienne slowed and listened. The blue lights on the soldiers' chestplates blinked between the trunks on both sides. She counted the gaps between the voices. The net had a seam, but only for a moment. A point of light dropped from the branches above her. It was no soldier's lamp. A tiny figure hovered before her face, no taller than her hand, with wings that shimmered like wet glass. The little fairy did not speak. She darted three feet to the right, stopped, and waited. Then she darted again, the same way. Vivienne understood. The fairy was showing her a path. She did not trust it, but she trusted the closing net less. She turned and followed the light. The dragon and the creature came after her. The fairy led them down into a fold of ground the soldiers could not see. Wet leaves swallowed Vivienne's steps. To her right, a soldier crashed past, so close she smelled oil on his armor. He did not turn his head. The fairy's glow dimmed as he neared, then brightened once he passed. They climbed a low bank and reached a wall of broad leaves and thick vines. Vivienne stopped cold. She knew this shape. It was a living plant grown into the form of a mansion, its layered green walls rising into the dark, its columns woven from vines. Another fortress like the one she had burned. The fairy flew straight for its wide door and hovered there, waiting. Behind her, the voices found the seam. A shout went up. The net had closed on empty ground, and now the soldiers turned inward, hunting for her trail. Their boots pounded back through the trees. Vivienne had one choice. The open forest offered nothing but the net. The living mansion offered walls, doors, and dark rooms she could lose herself in. She had escaped one plant prison. Now she would run into another to save her life. She went through the door. The dragon and the creature slipped in behind her. The fairy's light led the way down a long green hall. Behind them, the leafy door drew its vines across the gap and sealed shut. Vivienne stood in the dark, breathing hard. Kane's soldiers could not see her now. But she had traded the open forest for a maze of living walls, and she did not know if this fortress would let her out again.

Inside the living mansion, the dark pressed close. Vivienne stood in the green hall and listened. No boots. No flat voices. For now, the walls held Kane's soldiers out. But her body ached, and her creatures were spent. The dragon landed on the leafy floor and folded its wings. The spined creature dragged its barbed tail behind it. Both needed rest. She could not scout a way out with them stumbling at her heels. She needed a corner to hide them. Somewhere the soldiers would not find them if they broke in. Vivienne moved deeper down the hall, past thick vine columns and broad leafy walls. Every room opened onto another. The place was a maze with no clear back wall. She found no safe corner. She found only more doors. The fairy dropped down through the dark. Her wings threw soft light across the leaves. She hovered before Vivienne's face, the same small figure who had led her here through the net. She had not spoken then. She did not speak now. Instead she flew a slow circle around Vivienne, the dragon, and the creature, and light trailed from her hands like scattered sparks. Vivienne raised a hand to stop her. "There's no time for tricks," she said. "I have to find a way out. They need somewhere to sleep first." The fairy shook her head. She pointed at Vivienne, then swept her arm wide, past the walls, past the door, out toward the forest and beyond. Her meaning was plain. Not a corner. A door out. Not for the creatures. For all of them. Vivienne's chest tightened. "Home," she said. "You can take us home." The fairy smiled and nodded. She flew higher and spread both hands. The sparks she trailed did not fade this time. They gathered in the air and spun into a ring. The ring widened until it stood taller than Vivienne, a circle of pale light in the green dark. Through it she saw a room she knew. Wood floors. A window with morning light. Her own home, whole and quiet. The dragon lifted its head. The spined creature stood. Vivienne looked back once at the sealed door, where Kane's soldiers still hunted the wrong trail. Then she did not wait for a corner she would never find. She stepped into the light. The portal set her down on her own floor. Sunlight warmed her face. The dragon and the creature tumbled through beside her, safe. Behind them the ring shrank to a point and winked out. The forest was gone. The soldiers were gone. She was home. Then she saw the front door hung open. Boot prints crossed her floor in dried mud. On her table lay a black gauntlet, dropped like a message. Kane's soldiers had already been here. They knew where she lived. She had escaped the fortress, but she had run straight to the one place they would come next.

Vivienne stared at the black gauntlet on her table. Kane's soldiers knew this house. They would come back. She could run again, but they had tracked her here once. They would track her anywhere. She had to know how before she moved another step. She dropped to her knees and searched. She checked her clothes, her boots, the creatures' scales. Then she found it. A small metal disk stuck under the hem of her jacket. It blinked with a slow red light. A voice called from the stairs. "Viv? Is that you?" Cory came down fast, glasses crooked, still buttoning his shirt. He froze when he saw the mud, the gauntlet, the dragon curled by the wall. "What happened? Where have you been? I called you for days." His hands shook as he reached for her. He was not a fighter. He fixed things, read things, worried. But he crossed the room to her without a pause. "They put a tracker on me," Vivienne said. She held up the disk. "That's how they found the house. They're coming, Cory. Soldiers. Real ones." She saw the fear jump into his eyes. He looked at the door, then back at her. "Then we throw it out the window and drive," he said. "The car's out front." "They'll follow the signal. And they'll follow us." Vivienne shook her head. "There's no place they can't reach. Not with this." She crushed the disk under her heel. The red light died. But she knew a dead tracker only bought minutes. They had already sent the location. The fairy's light bloomed in the corner. She hovered near the front hall, then flew a slow circle and pointed out the window, toward the tree line beyond the yard. In the grass stood a stone base, cracked and marked with old carvings. A sword rose from it, its blade lit with a soft blue glow. The same stone. The same blade that had taught Vivienne to fight. The fairy had brought it within reach. Vivienne understood. The blade did more than teach. It answered wishes. She took Cory's hand and pulled him out the door, across the grass, to the stone. She gripped the wrapped handle. It was warm. "I wish," she said, "for Cory and me to be safe from every danger that hunts us." The blade flared white. Light poured up her arm and spread over them both. It sank into her skin and vanished. The glow was gone. She felt no different. No wall, no shield. Just the quiet yard and the warm handle in her fist. Then she heard engines on the road. Kane had come. Vivienne turned toward the sound, Cory at her side. The wish was made. But she did not yet know what it had bought her, or what price the blade would ask when the soldiers reached the gate.