When a woman's husband disappears during a kayaking trip, everyone assumes that he drowned. When she catches a glimpse of a man who looks exactly like him, it sets off a chain of events that unravels everything she thought she knew about him.
Five months later. Sydney quits the CIA and joins a Black Ops unit called "Authorized Personnel Only" alongside Dixon, Jack, Vaughn and... Sloane whom for limited immunity is co-operating with the APO. Meanwhile, the truth Sydney found out in Wittenberg endangers her relationship with Jack, and eventually she reveals the awful truth to Vaughn: about her father having Irina murdered over a year earlier.