Amateur tennis star Guy Haines wants to divorce his vulgar, promiscuous wife Miriam so he can marry the elegant Anne Morton, the daughter of a US Senator. On a train, Haines meets a smooth-talking psychopath, Bruno Antony, who tells him about his idea for a murder scheme: two perfect strangers meet and "swap murders" ? Bruno suggests he kill Miriam and Guy kill Bruno's hated father. Each will kill a total stranger with no apparent motive, so neither will be suspected.
Amateur tennis star Guy Haines wants to divorce his vulgar, promiscuous wife Miriam so he can marry the elegant Anne Morton, the daughter of a US Senator. On a train, Haines meets a smooth-talking psychopath, Bruno Antony, who tells him about his idea for a murder scheme: two perfect strangers meet and "swap murders" ? Bruno suggests he kill Miriam and Guy kill Bruno's hated father. Each will kill a total stranger with no apparent motive, so neither will be suspected.