Brad tightened the last wire on his pip-boy, checking the ham radio frequency one more time. The modified screen flickered green, picking up chatter from three different settlements. If he could get enough traders talking, sharing routes and safe zones, Calico Flats could become the hub he'd been planning. A place where information flowed as freely as caps, where people survived by knowing what others knew. But someone was staring at his wrist. Brad glanced up at the woman in grease-stained coveralls, her eyes fixed on the pip-boy's open casing. She nodded toward the prismatic lens he'd mounted inside, its brass housing catching the light from the coffee shop window. The layered filters rotated as the device cycled through frequencies, each calibration scratch gleaming like a tiny rainbow. She stepped closer, her voice low. "That's vault-grade optics married to civilian radio. Where'd you learn to bridge incompatible systems?" Brad closed the casing carefully, weighing his answer. She wasn't asking out of curiosity. Her hands had the calluses of someone who built things, fixed things. "Three months with a ghoul who knew prewar tech," he said. "And a lot of trial runs that didn't work." The woman pulled a thick manual from her pack, its RobCo logo faded but readable. "Small robot repair specs," she said. "Includes servo timing for securitrons. I'll trade it for your lens mounting technique. There's a security bot near the old Red Rocket that I can't crack without knowing how you filter interference." Brad took the manual, flipping through pages of circuit diagrams and repair protocols. This was exactly what his trading post needed to offer. Not just supplies, but knowledge worth trading. He explained the lens calibration, how to match vault optics with wasteland components, while she took notes on a scrap of paper. When they finished, she nodded once and walked toward the Dancing Dead's door, already studying his technique. Brad slipped the manual into his pack, his trading post suddenly feeling less like a plan and more like something real.

Brad's pip-boy crackled with static, then voices. Three different groups, all talking at once. Someone trapped in a collapsed building near old highway markers. Another group calling from what sounded like a basement, their transmission cutting in and out. A third voice, younger, saying something about raiders and a blocked exit. He traced the strongest signal to a brick structure with a radio antenna jutting from its roof. The building's blue door hung crooked on its hinges, and through the shuttered windows he could see the glow of active equipment. Inside, a base station setup sat on a makeshift table, its screen pulsing with incoming transmissions. Next to it lay a letter with dates scribbled in different handwriting, each one contradicting the last. The top line read "Dane 1: 2016" but below it someone had written "Is dute: 54: 2013." Brad picked it up, his stomach tightening. This wasn't intelligence. This was desperation dressed up as coordinates. He could relay these locations on his pip-boy right now. Get people moving, maybe save whoever was actually trapped. But the letter's confused dates meant someone was either panicking or lying, and he couldn't tell which group was real. If he sent traders into a raider trap because he didn't verify, his trading post would die before it started. If he waited for Chen to return and check the sites, people might die in collapsed rubble. Brad tucked the letter into his pack and switched his pip-boy to broadcast mode. He keyed in a simple message to all three frequencies: "Received your transmission. Need confirmation of location markers before response. Describe nearest landmark." Two groups went silent immediately. The third, the younger voice, came back with details that matched the old highway Brad knew. He marked that location on his pip-boy and headed for the door. One verified call he could answer. The others would have to wait for proof, even if it cost him sleep. His trading post would be built on information people could trust, or it wouldn't be built at all.

Martinez was waiting at the northwest salvage site when Brad arrived, crouched beside a tarp-covered shape that hadn't been on their previous maps. She pulled back the corner to reveal a monitoring station, its metal casing still intact despite the rust creeping along its seams. Brad knelt beside it, running his hand over the control panel. The switches were corroded but legible, each one labeled with vault sector designations. Beneath the main console, a steel box held a heating systems manual with diagrams that made his chest tighten. The schematics showed thermal distribution networks for standard vault levels, but page seventeen had a handwritten note in the margin: "Sublevel monitoring requires dedicated sensor array—see installation specs." He flipped to the back and found a folded blueprint showing three underground levels, with the third marked in red ink. Martinez watched him trace the diagram with his finger. "That's what you've been looking for, isn't it? Proof the sublevel exists." Brad nodded, already thinking about the bunker structure they'd passed on the way here, its cracked walls still bearing faded Enclave markings. If the monitoring equipment had been stored there, someone had known about Vault 17's hidden level long before the bombs fell. But that same someone had hidden this gear in a camouflaged bunker instead of leaving it with the vault itself. "This changes the trading post plan," Brad said, closing the manual. He couldn't just share route information anymore, not when vault tech this specific might draw the wrong attention. Martinez raised an eyebrow but didn't argue. She'd seen enough wasteland politics to know that some intelligence needed vetting before it went public. Brad tucked the manual into his pack, the weight of it settling against his spine like a new responsibility. His trading post would still happen, but now he'd need protocols—ways to verify who was asking before he verified what they wanted to know.

Brad marked the factory's location on his pip-boy before heading back to camp. The blueprints from the monitoring station had shown sublevel three directly beneath the old building, but they hadn't explained why power would still be running after all these years. The neon sign hit him first when he came back at dusk—a bright red glow spelling out words he couldn't read from this distance, mounted on the factory's brick face like a beacon. Brad's chest tightened. Every settlement he'd mapped had dead signage, dark tubes that hadn't lit since before the war. This one burned steady, pulling juice from somewhere below. He circled the building's perimeter until he found the conduit junction, a rusted panel half-buried in sand. Inside, copper wire gleamed where the insulation had cracked away, and when he held his pip-boy close, the radiation counter ticked higher. Not danger-high, but present. Active. Brad pulled a length of exposed wire free and examined the ends. The copper showed no oxidation where it connected to the junction, which meant current had been flowing through it recently—maybe continuously. He traced the conduit back to where it disappeared into the ground, following the line of rusted pipe until it vanished beneath the factory's foundation. The sublevel wasn't just powered. Something down there was drawing enough electricity to keep commercial signage running, and it had been doing it long enough that nobody questioned a lit sign in the middle of nowhere. He sat against the factory wall and updated his pip-boy notes, adding power consumption estimates and wire gauge measurements. The trading post would need this information eventually, but not yet. First, he needed to know what was using that power, and whether it knew people were starting to notice. Brad tucked the copper sample into his pack and stood. When Chen got back and they made the descent, he'd be looking for more than just a hidden sublevel. He'd be looking for something that had been awake and waiting while the rest of the world went dark.

Brad drove northwest toward the Vault-Tec Record Storage Station, following the route Martinez had marked three days earlier. The blueprints had proven sublevel three existed. The power readings confirmed something down there was still running. Now he needed the procurement files—the orders that would tell him what kind of equipment Vault 17 was built to support. The building sat alone against the desert, its brick facade cracked but intact, yellow Vault-Tec signage still bolted above the entrance. Brad approached slowly, scanning for signs of occupation. Empty. Behind the building, he found the sorting station Martinez had mentioned—a metal framework with labeled drawers and warning stickers, most of them faded past reading. The top drawers hung open, already picked clean by scavengers who'd taken anything that looked valuable. Brad knelt by the lower cabinet and worked the rusted latch until it gave. Inside, a stack of water-stained manuals sat wedged against the back panel. He pulled the top manual free and opened it carefully. Fusion Conduit Technical Manual, the cover read, with handwritten notes filling the margins. Brad flipped through pages of equipment specifications until he found the procurement order stapled to the back—Vault 17's power system requirements, itemized and signed. The numbers stopped him cold. The reactor specifications listed capacity for standard shelter operations, but beneath that, someone had added a second section in different ink: "Supplemental draw for iterative consciousness housing, sublevel three." The power requirements matched what he'd measured at the factory. This wasn't backup systems or emergency lighting. This was something designed to run indefinitely, drawing enough juice to keep an entire research facility operational. Brad photographed every page with his pip-boy, then tucked the manual into his pack. The procurement files gave him the what—specialized equipment built to sustain something alive and aware beneath Vault 17. But they also complicated everything. If he shared this at the trading post, word would spread fast. Scavengers, factions, people desperate enough to risk whatever was down there for pre-war tech. He'd wanted the trading post to save lives through shared knowledge, but this knowledge might get people killed before they understood what they were walking into. Brad stood and looked back at the sorting station, at the empty drawers other scavengers had already cleaned out. The decision felt heavy: open the post and control how this information spread, or wait until Chen returned and they'd secured the sublevel first. He started the engine and turned back toward camp. The trading post would still happen, but now he knew exactly what kind of intelligence he'd be trading—and why some secrets needed verification before they became common knowledge.

Brad was halfway back to camp when he spotted the figure standing beside the road. The man wore dusty leathers and carried a rifle slung across his back, one hand raised in a slow wave. Brad slowed the vehicle, recognition clicking into place—the caravan guard from Gecko, the one he'd pulled out when the deathclaws circled. The guard walked forward as Brad stopped, pulling a worn leather journal from his pack. "Been looking for you three days," he said, flipping it open to a marked page. "Set up camp by that broken sign post a mile back, figured you'd come through eventually." He turned the journal toward Brad, pointing to a sketched map with dates and locations. "Owed you a favor. Thought you'd want to know about this." The entry showed a route through the northern wastes, ending at a location labeled Sierra Army Depot with a note scrawled beside it: *Living thing inside. Hunts by electromagnetic signature. Took out our scout's pip-boy first.* Brad stared at the entry, his mind connecting it to the procurement files in his pack. The thing in Vault 17's sublevel drew massive power—enough to generate a strong electromagnetic signature. If something at Sierra was hunting EM sources, it might be drawn to sublevel three once activated systems started broadcasting. "You saw this yourself?" Brad asked. The guard nodded. "Lost two people before we figured out what it was tracking. It's systematic. Goes after the strongest signal it can detect." He tapped another entry showing equipment readings. "Your pip-boy modification—the ham radio setup—that'd light you up like a beacon." Brad closed the journal and handed it back, but his hand was already moving to his pip-boy's power settings. The trading post needed the radio to work, but if he broadcast from Calico Flats with the sublevel active nearby, he might draw whatever was at Sierra straight to the settlement. He looked at the guard, then back toward camp where the procurement files sat waiting. The favor had been repaid, but it had cost him the clean choice he'd been planning. He couldn't open the trading post until he knew what was in that sublevel—and whether turning it on would paint a target on everyone within range.

Brad turned the vehicle back toward camp, the guard's warning still sharp in his mind. The sublevel pulled power in patterns he'd measured himself—consistent, active, purposeful. If that signature drew attention the way the guard described, then every step closer to opening it became a risk he couldn't ignore. He spotted the old watchtower three miles from the factory perimeter, its rusted railings still holding despite the broken windows. Brad climbed to the top platform with his modified pip-boy and a clipboard, settling in as the sun dropped toward the horizon. The factory's silhouette stood dark against the fading light, and he powered down the ham radio completely before checking the standard radiation counter. The baseline reading held steady for twenty minutes, then jumped. Not much—just enough to notice. He marked the time on graph paper, watching the numbers climb and fall in a rhythm that matched nothing natural. Two hours later, the pattern shifted. The power draw spiked higher than anything he'd measured before, then dropped to almost nothing for six minutes before climbing again. Brad tracked each change on the clipboard, his pen moving faster as the readings refused to settle into the stable consumption he'd documented all week. Whatever was down there wasn't just running—it was doing something different tonight. He thought about the procurement files in his pack, the phrase "iterative consciousness housing" circling back as he watched the numbers spike a third time. The guard's warning about electromagnetic hunting made every reading feel like a countdown. Brad packed the clipboard and descended the watchtower as full dark settled in, leaving his ham radio powered down. The factory stood silent across the distance, but the pip-boy's counter told a different story—something inside had changed its behavior, and he'd captured enough data to prove it. He couldn't share this at the trading post, not yet, but Chen would understand the pattern when he returned. The question wasn't whether to investigate the sublevel anymore. It was whether they could get inside before whatever was drawing that power decided to do something worse than change patterns in the dark.