A soft click. Then, the distinct, measured rhythm of footsteps paused, directly outside the main door. Renia froze, the antique key growing cold in her palm. The quiet held between them until a gentle rap sounded on the wood, precise and polite. “Klara? Are you there? It’s Milosz.” His voice, usually a warm rumble, held an edge of strained concern. “I’ve been calling. The network seems to be failing.” Renia blinked. Milosz. Her mind raced, sifting through possibilities. Was he part of Teodor’s monitoring? Or genuinely worried? The network failing was plausible; city-wide infrastructure had been prone to glitches recently. But the security system had just locked down the building, not just Klara’s specific residence. The logic fell apart under scrutiny. She moved silently to the door, pressing her ear to the cool metal. Another knock, a touch more insistent. “Klara, if you’re in there, just say something. I saw your car still outside. I’m worried.” She knew Klara would have answered by now, or at least made a sound. This was a test. She pressed her hand to the silver key, its intricate pattern digging into her skin. She had to appear normal, undisturbed. She cleared her throat, forcing a small, sleepy yawn. “Milosz? What time is it?” Her voice was rough, convincing. “Just after midnight,” he replied, relief seeping into his tone. “I was checking in. Is everything alright? The main grid is predicting a widespread outage in the eastern districts, starting in the next hour or so. I thought you might want to prepare.” A blackout offered cover. The Berenovo Atheneum, a monument to light and glass, would lose its primary feeds. Its surveillance apparatus, while robust, would be stretched thin across backup circuits. This was her chance. “I’m fine, Milosz. Just lost track of time,” Renia called back, trying to sound a little annoyed, a little put-upon. “Thanks for the warning. I’ll make sure everything’s charged.” She heard his footsteps retreat, the slow, deliberate pace echoing in the hallway. Only when the entry foyer’s heavy outer door clicked shut did she allow herself to move. The silver key lay on the credenza, a silent promise. She had no idea what it opened, but its existence suggested Klara had a secret that went beyond the digital journal. And Renia intended to find it. Within the hour, streetlights flickered, then died. The distant glow of the financial district vanished, leaving the skyline in stark, silhouetted relief. Renia slipped out into the street, carrying a high-powered torch and a lock-picking kit. The air was cool, carrying the faint scent of rain and damp concrete. She moved through the shadows, a ghost amidst the ancient, sleeping city blocks. The Berenovo Atheneum loomed, a skeletal titan against the starless sky. Its unfinished glass panels, usually reflecting the city’s ambition, now absorbed the void. The main entrance, a cavernous maw of polished marble, was dark. Renia skirted the perimeter, heading for a service entrance she’d noted on Klara’s blueprints—an auxiliary door used by construction crews, less likely to have redundant locks during a power failure. The air hummed faintly with the distant thrum of emergency generators, a low pulse against the hushed streets. The lock was a modern electronic unit, its latch cycling erratically under the grid's dying voltage. After several minutes of manipulation, the internal latch released with a soft click. The heavy steel door swung inward, revealing an unlit hall. The air inside was still, heavy with the scent of raw concrete and metal dust. Renia clicked on her torch, its beam a solitary spear in the vast, echoing space. The Atheneum was a maze of half-finished dreams, exposed rebar jutting like skeletal fingers, vast sheets of draped plastic rustling with unseen drafts. She navigated by memory, guided by the mental map of Klara’s blueprints, her forensic mind charting every turn, every shadow. The absence of ambient light made the atrium feel even larger, hollowed out. Every distant clang, every groan of settling steel, reverberated with an unsettling intimacy. She found the service passage, precisely where she remembered it from her site tour with Teodor. It was tucked away, almost an afterthought, a narrow passage barely wide enough for one person. It wasn’t on any public plans, only the detailed architectural schematics Klara had hidden. The door, a plain metal slab, was surprisingly unlocked. It swung open to reveal a short, unlit passage. Renia stepped inside, the air immediately thicker, dustier, as if undisturbed for years. The pathway was short, leading to a small, windowless chamber. It wasn’t a storage room, or a utility closet. It was just… a space. An empty room, forgotten or deliberately concealed. Her torch beam swept across the floor, kicking up motes of dancing dust. Then she saw it. Tucked in a corner, half-obscured by a fallen sheet of drywall, lay a collection of discarded items. A crumpled energy bar wrapper, a worn-out work glove, and a small, tarnished silver locket. It was oval, with delicate filigree work around the edges. Renia’s fingers trembled as she reached for it. She knew this locket. Knew it intimately. Klara had worn one just like it. A gift from their grandmother, lost during a childhood picnic by the River Veles. Identical. The design was unique, a family heirloom, not mass-produced. Renia remembered Klara crying for days after losing hers, the only time her twin had ever seemed truly vulnerable. Renia had secretly spent weeks searching the riverbanks, but it was never found. Klara had stood in this concealed pocket. And she had dropped the one item she never took off, the single link to their shared past. A piercing electronic chirp broke from the passage behind her. A tripwire sensor had tripped. How? She hadn’t triggered any visible sensors. This was an internal system, one designed to catch an intruder already inside. Before she could step back, the door to the small chamber slammed shut with a sharp clang, cutting off the dim glow from the hall. Then, a powerful beam of light cut through the gloom, momentarily blinding her. “Hold it right there!” A gruff voice, amplified by the confined space, commanded. “Don’t move a muscle.” Renia blinked, trying to adjust her vision. A uniformed watchman, square-jawed under the brim of his cap, stood in the doorway, a heavy flashlight leveled at her chest. He held a radio to his mouth, its static hiss a prelude to further dread. Her ribs ached against the sudden pressure of her breath. “Intruder apprehended in Sector Delta, Corridor 7,” the guard rasped into the radio. “Female. Solo. Looks like the architect. Over.” Silence for a beat, then the crackle of the radio intensified. A voice, deep and resonant, cut through the static, unmistakable even through the distortion. Teodor Beren. “Let her go,” Teodor’s voice commanded, calm and utterly devoid of surprise. “She’s exactly where I want her to be.”

The Unseen Corridor