A murder victim is found near a river by Hélène Batistelli (Mélanie Thierry), a psychiatrist. Richard Kemp (Jean-Hugues Anglade), a French Police Captain, investigates the murder, and discovers it is similar to those in a serial-killer case he worked on in the beginning of his career. Kemp is attacked by an unknown assailant, thrown into the river, returns to land, and finds he is twenty years (1989) in the past, just before the murders begin. Kemp attempts to prevent the murders but becomes the main suspect only to find help from a younger Hélène.<ref name="mkf">[http://www.moscowfilmfestival.ru/miff35/eng/films/?id=35064 Back in Crime (L'Autre vie de Richard Kemp) 35th Moscow Film Festival]</ref>