When a mute woman suffering from amnesia (Emma Thompson) arrives at the gates of an old orphanage, private investigator Mike Church (Kenneth Branagh) is asked to find out who she is. With the help of a hypnotist (Derek Jacobi), the woman regains her voice and recalls vivid past memories of a couple from the 1940s torn apart by murder. Church begins to develop feelings for the woman, who he calls Grace, and then discovers he has a connection to the tragic couple from the 40s.