After years of assuming FBI Agent Emily Byrne was a possible victim of serial killer Conrad Harlow, she is miraculously returned to her family. Emily, however, has to struggle with the mysteries of her captivity and the fact that everyone has moved on without her. Investigating Emily's disappearance,, her husband Nick Durand detects a connection between Emily and a sex trafficker Robert Semerov, who has negative feelings about Emily. When the FBI traces the sex trafficker, suspicion suddenly moves to Emily. Is she still the same person they knew?

When the testifying witness against Emily is murdered, all signs suggest that the murder was committed by Emily. While Tommy Gibbs and the Boston Police Chief are accusing Emily, she and Nick look for an FBI agent who forced the witness to lie. For Emily, there is suspicion that this agent is the one responsible for her abduction.