? ? ?

  The first leg was a long march across open terraces, and it was here the scale really started to hurt.

  You could walk for twenty minutes and still be in the same “place,” because the place was measured in kilometers and your legs were measured in meters.

  The terrace surface changed under our boots—smooth ceramic to rougher patterned plates, then to sections where the “stone” rose in shallow ribs that forced your calves to work.

  Overgrowth thickened in patches, braided mats that tried to snag our boots. Fungal fans released faint dust when we brushed past, and our filter warnings chirped like anxious birds.

  Chloe kept stopping to stare at things that were, objectively, just walls.

  “Look at the layering,” she kept saying. “Look at the seams. That’s not the same build language. That’s—”

  “That’s a wall,” Trevor muttered.

  “That’s history,” Chloe snapped back.

  Frankie floated between them like a petty referee. “Mom and Dad are fighting again,” he announced.

  I tried to keep my eyes on the horizon, but it kept lying.

  Sometimes a tower looked close until you walked for ten minutes and it didn’t change size at all. Sometimes a low ridge looked minor until you approached and realized it was the edge of a drop that fell into haze for what might have been hundreds of meters.

  Drones buzzed ahead of us, mapping, sampling, occasionally dipping out of sight behind a rise and returning with their feeds distorted for a heartbeat.

  “Depth resolution is degrading intermittently,” Mercy reported. “Not consistent with simple line-of-sight occlusion.”

  “Translation,” Frankie said: “The geometry is being weird again.”

  “Do not anthropomorphize the geometry,” Mercy said.

  “I am not,” Frankie protested. “I am complaining about it. There’s a difference.”

  We crossed a skybridge—a broad span connecting two terrace shelves—its surface patterned with three parallel grooves that made my brain itch with the urge to count.

  Halfway across, sound died.

  Not muffled. Not reduced.

  Gone.

  Our boots hit the bridge and the crunch of grit vanished. My breathing became the loudest thing in my universe. Chloe’s drone buzz muted to nothing.

  For ten seconds, we walked in total audio deadness, the only noise the faint internal hiss of our suits.

  Then, just as abruptly, sound snapped back and hit my ears like a wave. My own footsteps crashed into me, too loud.

  Chloe gasped. “That was—”

  “A field boundary,” Mercy said quickly. “Localized sound attenuation. You crossed an interface.”

  Trevor’s voice shook. “Why is there a sound attenuation interface on a skybridge?”

  Frankie floated closer to my shoulder. “Because someone built it,” he whispered. “Because someone had reasons.”

  ? ? ?

  And then, because the universe never let you sit in awe too long, the terrace buckled under us.

  It wasn’t dramatic at first.

  A subtle give under my boot—like the surface was tired.

  Then another.

  The patterned plates ahead of us trembled, a slow ripple traveling across the terrace as if something underneath had shifted.

  “Back,” I snapped.

  We moved fast, not running yet, boots slipping on the slick surface. Chloe’s drone feed spiked with vibration data. Mercy’s voice sharpened.

  “Structural variance increasing,” she said. “Localized shear risk—”

  If you discover this narrative on Amazon, be aware that it has been stolen. Please report the violation.

  The terrace edge ahead of us cracked with a sound like a deep bone breaking.

  A section of walkway sagged, slow, then snapped down into haze, taking a chunk of overgrowth with it. The fall was silent for too long, then came back as a distant, delayed roar when the collapsing material hit something far below.

  Chloe swore. Trevor made a noise that wasn’t words.

  Frankie’s projection flared brighter. “Oh cool,” he said. “We found the part of the city that does sinkholes.”

  Another plate shifted under Trevor. He stumbled toward the crack—too slow, too human.

  I grabbed his harness strap and hauled him back.

  At the same time, the terrace did something worse than collapse: along the fracture line, a low ridge extruded upward in a smooth, fast bulge—like the material had remembered what a guardrail was and tried to do the job late. It wasn’t high enough to save anyone who committed to the fall, but it was high enough to turn a stumble into a bruise instead of a funeral.

  Trevor slammed into it, bounced, caught his balance.

  He stared at the ridge like it had offended his worldview.

  Chloe stared at it like it had just spoken to her in a language she almost knew.

  Mercy went very quiet for a beat, then said, carefully, “Reactive structural behavior observed. Not preemptive. Not targeted. Triggered by load shift.”

  Frankie blinked. “So it’s like… the world’s worst safety feature.”

  Trevor swallowed hard and finally managed words. “That wasn’t erosion,” he said. “That was… mechanical fatigue. And then—”

  “And then a response,” Mercy finished.

  Trevor’s eyes tracked the void. “Response to what?”

  Nobody answered.

  Because none of us had a satisfying answer, and because the only way to keep the fear from eating us was to keep moving, we continued—slower now, eyes and drones and instincts all stretched thin.

  ? ? ?

  We found verticality sooner than I expected.

  A ramp spiral opened in the terrace ahead, a broad curve that dropped into the structure like a freeway on-ramp designed by someone with no interest in human sanity. The ramp was wide enough to drive a convoy down, its sidewalls rising in shallow ribs.

  Chloe leaned over the edge and peered down. Her helmet light vanished into darkness like it had been swallowed.

  “I can’t see the bottom,” she whispered.

  Frankie floated over the edge and stared. “That’s because it’s the world’s most haunted parking garage,” he said.

  “Don’t say that,” I muttered.

  “Now it’s true,” Frankie finished smugly.

  Trevor’s voice came thin. “We do not go down there today.”

  “Why not?” Chloe demanded immediately.

  Trevor jabbed a finger at the darkness. “Because we have no anchor. No rope. No—”

  “We have rope,” I said.

  “Not enough rope,” Trevor snapped.

  Mercy cut in. “The relay vector intersects multiple vertical transit networks. If you avoid vertical movement entirely, you will increase travel time significantly.”

  Trevor stared at the arrow overlay like it was a personal betrayal. “Of course it does,” he muttered.

  We compromised the way we always did: by doing the dangerous thing but pretending it was a controlled decision.

  We went down just far enough to see.

  The ramp spiral descended into a canyon-like shaft, walls curving away, lined with grooves and panels. Drones dipped ahead, their depth sensors getting confused, then recovering, then confused again.

  Halfway down, we found a corridor segment that made Chloe stop dead.

  The wall material changed.

  Not drastically. Not like switching from metal to stone. More like switching from one kind of printed ceramic to another—different sheen, different micro-pattern, different join seams.

  Chloe’s voice went reverent. “That’s not the same build language,” she whispered. “That’s… different.”

  Frankie floated close, squinting. “It’s more… clean,” he said. “Less organic. More like—”

  “More like the stuff on the ship?” I asked before I could stop myself.

  Chloe nodded slowly. “Not identical. But… closer.”

  Trevor’s voice was tight. “So there are layers.”

  “There are layers,” Chloe agreed, eyes bright. “Venusian base. Martian retrofits. Veloran interventions. It’s all—”

  “Don’t get ahead of yourself,” Trevor warned, but he sounded less certain. Less dismissive.

  We pushed a little deeper.

  The corridor’s faint wall illumination woke as we passed—not bright, not welcoming, just a soft glow that made the ribs and seams visible. It didn’t follow us like a spotlight. It didn’t “guide” us. It simply… came on, then faded behind us.

  Mechanical response. Occupancy detection. Something.

  Chloe reached out, almost touching the wall, then jerked her hand back like she’d been burned. “Sorry,” she muttered, embarrassed by her own impulse.

  Frankie watched her with something like sympathy. “It’s hard not to touch history,” he said quietly.

  Trevor’s voice softened, just a hair. “History can kill you.”

  We turned back before we did something stupid.

  On the way up the ramp, something small moved in the overgrowth above us.

  A quick flicker. A shadow. Too fast to see clearly.

  Drones whirred, adjusting. Chloe’s visor tagged a heat signature—small, dense, moving with sharp acceleration.

  “Hold,” I said.

  The thing darted out of a crack in the wall—a creature about the size of a cat, but wrong in its proportions. Too many joints. A hide that looked like layered bark. It moved in short bursts, stopping to freeze perfectly still, then darting again.

  Its head turned toward us.

  No eyes I could see. Just a flat plate that shifted, like it was reading us through temperature and vibration.

  Frankie made a tiny, strangled noise. “Oh no,” he whispered. “It’s got predator software.”

  Trevor hissed, “Do not move.”

  “I’m not,” Chloe whispered, though her whole body vibrated with the desire to either run or grab it and name it.

  The creature darted forward—fast.

  I raised my arm, not aiming a weapon, just presenting my suit’s forearm shield plate.

  The creature hit it with a sharp tap—testing. The impact came through my suit as a faint vibration.

  Then it darted back, vanished into the crack, gone.

  We stood frozen for a full five seconds after it disappeared, waiting for the universe to prove it was only a scout for something bigger.

  Nothing came.

  Chloe exhaled slowly. “That was a test,” she whispered.

  Trevor’s voice was tight. “Everything here is a test.”

  Frankie’s projection flickered, then steadied. “I would like to formally request that we never be tested again,” he said.

  I laughed, breathless. “Denied.”

  We reached camp by late “day,” if you could call it that. The dome’s light had shifted again, turning distant terraces into pale bands.

  We sealed the shelter bubble and stripped helmets, faces sweaty and tired and lit with the weird joy of people who hadn’t died.

  Chloe talked too fast over ration packs, words tumbling out of her like she had to empty her brain before it burst.

  Trevor ate in tight silence, eyes flicking to the shelter ribs every time a distant vibration rolled through the terrace.

  Frankie hovered quieter than usual, dimmer, like he was conserving something.

  Mercy stayed on comms, present but strained in a way she didn’t name. Her voice kept catching on certain words, like she was trying not to sound scared.

  Outside, the dome’s spectrum shifted slowly, dimming not like sunset but like someone turning a dial.

  Light-rivers in the distance changed brightness and color without anyone touching them—blue to pale green to white, drifting along the terraces like slow blood.

  Somewhere far away, a low pressure wave rolled through the city—thunder that wasn’t thunder, a deep groan that felt like a structure settling under a load too old to care about.

  Trevor flinched.

  Chloe went silent.

  Frankie whispered, “Something big moves out there.”

  Mercy’s voice came softer than usual. “I am monitoring,” she said. “I do not have… context.”

  I lay back in my pod later, exhausted in a way sleep didn’t fix.

  Before I zipped it shut, I glanced out through the shelter’s translucent wall.

  The city sprawled beyond us, endless terraces fading into haze, towers like mountains, transit ribs like rivers.

  Our camp was a small bubble of light pressed against the edge of an alien continent.

  Temporary.

  And now we had a direction.

  In the morning, we would move toward the relay region.

  We weren’t waiting.