Xadia counted five dead fish before breakfast. She dragged their pale bodies to the reef's edge and lined them up, the way her mother once lined up the healthy catch. Once, these waters glowed. The coral pulsed with light. Then the heart-crystal vanished, and the magic drained with it. Now the water grew murkier each day. Xadia knew only one truth: find the crystal, or watch her home die. But she had no idea where it had been lost. She swam home to the pink house that sat half-sunk near the reef. Its warm stucco walls had once faced open air. Now the tide covered its lower windows. Xadia kept her mother's charts inside, rolled and dry behind the wooden door. She unrolled them on the floor and stared. The charts marked currents and trenches. None marked where a crystal might sink. She pressed her webbed hands flat and felt useless. Her cat pawed at the door. The little creature had pink fur streaked with yellow, and she never liked the water rising in the house. She trotted to a loose floor tile and scratched it, meowing. Xadia had scolded her for that habit a hundred times. "Stop," Xadia said. "There's nothing under there." The cat scratched harder. She hooked a claw and pried the tile up. Beneath it lay a small leather journal, swollen with damp. Xadia had never seen it. She lifted it and recognized her mother's handwriting on the first page. She read fast. Her mother had written about the crystal in the weeks before she died. One line stopped Xadia cold. "I carried it north when the sickness spread, to keep it from the raiders. I hid it near the drowned bell." Xadia read it twice. Her mother had not lost the crystal. She had hidden it, on purpose, and told no one. Xadia's hands shook. For months she had drifted with no lead. Now she had a direction and a marker. The drowned bell. She did not know where it stood, but her mother's charts marked the northern trenches. She could start there. She rolled the charts tight and tucked the journal against her chest. The cat wound around her tail, purring now. Xadia scratched behind the yellow-striped ears. "You found it," she said. "You stubborn thing." Then the floor shifted. A low groan rose through the house, and a crack split the wall near the door. Water pushed in fast, cold against her legs. The old house had held for years. It would not hold much longer. Xadia grabbed the journal and the charts and kicked for the door. She broke into open water and looked north. Somewhere out there stood a drowned bell, and a crystal her mother had died protecting. Xadia had her lead at last. She swam toward it, leaving the sinking house behind.

Xadia reached the northern water by dusk. The current turned cold here. She unrolled her mother's charts against a flat rock and pinned the edges with pebbles. The trenches were marked, just as she remembered. But over the deepest trench, her mother had drawn small symbols in a tight row. Xadia traced them with one webbed finger. She did not know a single one. They marked the drowned bell, she was sure of it. She just could not read them. She tried for an hour. She copied the symbols in the silt. She turned the chart sideways, then upside down. Nothing made sense. Her chest tightened. The lead she had crossed all this water to follow ended in a code she could not crack. A dog barked. Xadia spun around. On a rise above the trench sat a small blue house, its walls bright even in the dim water. A husky-shaped dog stood on the porch. Its coat swirled blue and green, and its tail wagged hard. It barked again and pawed toward the door. The door opened. A blue axolotl stepped out. He wore a green tunic and a dark cloak trimmed with pale stones. He moved like someone who belonged to these deep waters. He studied Xadia, then her chart. "You're reading trench-marks in the dark," he said. "Alone. That's how axolotls get lost out here." "I'm not lost," Xadia said. "I'm stuck." She held up the chart. "These symbols. I can't read them." He swam closer. His dog circled Xadia once, sniffed the journal at her chest, then sat. The axolotl leaned over the chart. His expression changed. He tapped the tight row of symbols. "Old tide-script," he said. "Few write it now. My grandmother did." He looked at Xadia. "Who drew this?" "My mother." He was quiet a moment. Then he read the symbols aloud, slow and careful. "Descend the third trench. Follow the cold seam east. The bell hangs where the water stops moving." He pointed past the rise, into the dark below. "That way. A full day's swim, maybe more." Xadia's heart pounded. She had a direction now, a real one. She grabbed her charcoal and copied his words onto the chart's edge in plain marks she could read. "The cold seam is dangerous," the axolotl said. "The water there is dead. Nothing lives in it." He crossed his arms. "You'll need someone who knows the way." Xadia looked at him. She had come alone this far. But she could not read the deep, and he could. "Then come with me," she said. He glanced back at his blue house, then at his dog. The dog stood and wagged its tail toward the trench, ready. "East it is," he said. Xadia rolled the chart tight. The symbols were beaten. Now the dead water waited.

The cold seam ran east like a crack in the seafloor. Xadia followed it with the blue axolotl and his dog at her side. Then the seam narrowed and stopped. A wall of sunken debris choked the passage. Broken beams, cracked pots, and a rusted gate lay heaped from floor to roof. No water moved through. Beyond it, she could not see. Her pet bunny, tucked in the crook of her arm, pressed close and trembled. "The bell is past this," the blue axolotl said. "But nothing swims through that." Xadia set the bunny on a flat stone. She grabbed a beam and pulled. It held. She braced her feet and pulled again. The whole heap groaned but did not shift. She tried a cracked pot next. It came loose, then three more slid down to fill the gap. The wall was worse now than before. "Stop," a new voice said. "You'll bury yourself." A green axolotl swam down from a green house perched on the rise above. Xadia had not seen him watching. He wore a green tunic stitched with gold marks and a belt of worn pouches. He moved easy, sure of the dead water. He studied the debris the way the blue axolotl had studied the chart. "You're pulling the wrong stones," he said. He pointed at the rusted gate near the bottom. "That one holds the rest. Pull it, and the pile falls away from you, not on you." Xadia looked at the blue axolotl. He gave a small nod. She trusted the green one, or she gave up here. "Then help me pull it," she said. The green axolotl gripped one side of the gate. Xadia gripped the other. His dog barked once from above. "On three," he said. He counted. They both hauled back. The gate tore free. The debris shifted, groaned, then slid sideways in a slow crash. Silt boiled up and blinded her. She held the stone with the bunny on it and waited. When the silt cleared, a gap opened in the wall, dark and wide enough to swim through. But the crash had cracked the roof above the seam. A fresh trickle of loose sand poured down. The passage was open now, and already filling again from the top. "It won't stay open," the green axolotl said. He looked past the gap into the black water beyond. "And I know what's on the other side. You don't." Xadia scooped up her bunny. The way east was clear, for now. She had spent her whole plan to open it. To reach the bell before the seam closed, she needed the green axolotl to lead. And he had not yet said he would.