Neurosurgeon and researcher Laurence Jeffries (Anthony Perkins) had enough of his spouse Frances (Jill Ireland) stepping out with her journalist lover Paul (Henri Garcin). To that end, he brought an amnesiac John Doe patient (Charles Bronson) into his home-began conditioning him to believe that Frances was his own wife-and left the cheating couple to the reprogrammed stranger's jealous, murderous rage. Unusual outing from France also stars Agathe Natanson, André Penvern.