Dr. Amy Larsen (Molly Parker) forgets the past eight years of her life in a serious car accident, her whole world is turned upside down, and now she must try to get her life back on track.
On the surface, Shirley (Jennifer Garner) is an ordinary college graduate student, but in reality, she has been working for a secret intelligence organization called SD6 for many years. When she married her boyfriend, Shirley decided to reveal her true identity to her, but her boyfriend was assassinated by the organization's security personnel. In a fit of rage, Shirley chose to "strike" and was later wiped out. In the midst of the crisis, Shirley learns that her father Jack (Victor Garber) is also a secret agent like herself, and that it is not a state organization that supports SD6 behind it, but a reactionary element with powerful force. In private and public, Shirley and SD6 have a common hatred, she returned to SD6, but at this time,