She found a stranger in gray coveralls crouched beside an open panel near her private conference room, and her voice sharpened immediately as she demanded to know who had authorized him to be there. Darius answered simply that facilities had sent him, she asked with the particular chill she reserved for people who had overstepped, whether he understood whose floor this was. And he told her that he did. She informed him that meant he understood he was not supposed to be there. and Darius, without raising his voice or breaking eye contact, told her that he also understood her air system was malfunctioning. Celeste went still.
She did not believe, not for a moment, that a maintenance technician could know something her entire medical team had failed to diagnose over three long years. And she told him as much, accusing him of overstepping the bounds of his job. Darius did not argue with her. He simply asked for permission to finish inspecting the system he had already started. And something in his calm insistence made her step back rather than order him removed.
When he pulled the filter housing open, he found a replacement filter installed only weeks earlier, and it was the wrong specification entirely, a variant that should never have been approved for a building of this size. He held it up to the light and studied the manufacturing stamp on its edge, and what he saw there made the back of his neck prickle with a feeling he did not like. The filter had been swapped on almost the exact date Celeste's symptoms had grown most severe, Darius said quietly, mostly to himself, that someone had changed this on purpose, and he did not yet know who. He photographed the filter from every angle before recealing the panel, careful to leave no visible trace that he had discovered anything at all. Years of working in buildings that owners preferred to keep quiet, had taught him that the moment someone realized they were being watched, evidence had a habit of disappearing overnight.
He noted the exact placement of the screws, the layer of dust across the housing, and the faint discoloration along one edge of the panel that suggested it had been opened and closed more recently than official records would ever admit. Walking back through the corridor toward the service elevator, he found himself replaying every conversation he had overheard about the chief executive's illness, searching his memory for a detail that might connect a defective part to a person with a reason to want her weakened. Nothing came to him yet, but the unease that had settled into his chest told him this was only the beginning of something far larger than a faulty filter. Darius requested access to the building's full maintenance history, a request that facilities management initially denied on the grounds that it fell outside his contractor clearance. Celeste, who had overheard the exchange from her office doorway, and found herself unexpectedly curious about the technician who had spoken to her without a trace of fear, personally authorized the access herself.