A high-profile investigation takes a dangerous turn when the BAU begins noticing a disturbing pattern: witnesses disappear, safe houses are compromised, and critical leads seem to reach the unsub before the team can act on them. At first, it looks like bad luck. Then it happens again. And again. As evidence mounts that someone is leaking information from inside the investigation, suspicion begins spreading through the task force. Determined to uncover the truth, Y/N starts following a lead of her own. She never gets the chance to share what she finds. When Y/N suddenly vanishes, the BAU is forced to confront a terrifying possibility: she discovered the identity of the mole—and someone made sure she couldn't talk. Now, with trust shaken and time running out, the team must expose the leak, catch a killer, and bring one of their own home before it's too late.