When a domestic terrorist organization executes a coordinated attack on a crowded office building, the Behavioral Analysis Unit finds itself in a race against time to stop a devastating bombing. But the crisis becomes personal when one of their own—Y/N—is trapped inside during the lockdown. Injured during the initial takeover and cut off from communication, Y/N must survive inside a building turned into a pressure cooker of fear and violence. As the BAU works outside to profile the attackers and locate the bomb, Y/N moves through the shadows, hiding from terrorists, rescuing hostages, and uncovering critical clues about the explosive device no one else can reach. With the countdown ticking closer to zero, the line between victim and key asset disappears. What begins as a rescue mission becomes a desperate race in which Y/N may be the only person capable of stopping the bomb from inside the building—before everyone inside, including them, is lost forever.