Gabriel, Riley and Lillian head to San Francisco when the FBI's Witness Protection database is hacked and someone is blackmailing witnesses to carry out a terrorist attack. The stakes are even higher for Lillian, as her daughter lives in the city.

When Gabriel sees himself as the suspected murderer in his crime scene cyber-render, he and Riley must find the mastermind who is framing him. Meanwhile, Lillian is relieved of duty and Tetazoo takes charge with a full-scale manhunt for Gabriel and Riley.