The room was almost completely dark. The modern cabinet still glowed faintly against the old concrete wall, and the red status light remained on. The display showed less time than before. Eli stayed near the doorway, heart hammering, and read the warning information he could see without touching the equipment.
Then he noticed a second feature, one he had passed earlier without understanding its significance. Beneath the original panels was a worn emergency isolation notice, protected behind yellowing plastic. The diagrams above it did not match the newer machinery exactly, but they described a legacy safety function intended to leave the building's original systems in a safe state during an emergency. It was not an invitation to experiment. It was a reminder that the people who built the original installation had understood that equipment could fail and that an emergency response required a way to stop it.
Eli took a photograph of the notice with his phone and read it twice. His uncle had warned him never to assume that an old emergency control still worked after unauthorized modifications, and the alterations in this room were exactly the sort that made that warning important. There was no safe experiment a child could perform here. Eli wanted to go upstairs and show Mara the photograph.
But before he could leave, the control display changed again.
A new warning appeared on the screen. It indicated that an external command had been requested, although Eli could not tell whether the command had been accepted. The red indicator flickered. A low vibration passed through the floor, then stopped. Eli looked toward the door, realizing that somebody outside might be trying to change the system remotely.
He had no time to think through all the possibilities. He acted on the only safety instruction he could make sense of, using the clearly identified emergency isolation function exactly as the original panel directed. He did not open the newer cabinet or attempt to alter its internal wiring. For one terrible second, nothing seemed to happen. Then the warning light went dark, the display blanked, and the mechanical hum began to fade.
Eli stood still, hardly breathing.
The silence that followed was not proof the building was safe. He knew that. An inactive display could mean the control system had stopped, or it could mean only that he could no longer see what it was doing. He would not know which until a trained crew examined it. But the immediate warning had disappeared, and the low knocking that had followed him since the platform was gone.
He turned toward the stairs.
Footsteps sounded above him.
They were not the hurried steps of Ronan or Cutter. They were measured, unhurried, and separated by just enough time to suggest that the person descending believed he was alone. Eli backed toward the wall beside the old steel cabinet, his flashlight low. The small pool of light from the newcomer's torch appeared on the stairs, traveled across the floor, and settled on the now-dark control station.
The footsteps stopped.
"Well," a man's voice said. "That's unexpected."