The Spire had changed. Caleb stood in the shadow of the glass tower, staring up at its darkened facade. It had been three weeks since he'd last been here—three weeks since the infiltration, the stairwell confrontation, the desperate flight through the service tunnels. In that time, the building had been seized by federal agents, stripped of its personnel, and sealed behind a perimeter of concrete barriers and yellow caution tape. The agency's front company, Aegis Solutions, had been dissolved. The fifty floors of offices and server rooms now sat empty, their secrets extracted by investigators, their walls echoing with the ghosts of everything that had happened here. But the Spire was not dead. Not completely. The listening signal was still broadcasting from somewhere inside—a faint, rhy

