8 years ago, schoolteacher Samantha Kane suffered total memory loss. She lives a happy family life with her 8-year-old daughter and has no idea about her bloody past, because once this beautiful woman was an agent Charlie Beltimore, fulfilling secret orders of the CIA. Shocked by the unexpected return of some of the skills and psychological training of a professional hitman, Samantha tries to make sense of her past. Detective Mitch Hennessey, who began by investigating the life of a simple teacher, finds himself drawn along with Samantha into a secret CIA operation.