In London, the American housewife Kit Preston (Doris Day) has been married for three months with the British executive Anthony Preston (Sir Rex Harrison). In a foggy day, while walking in a park, Kit is threatened by a voice that tells that she will be murdered soon. On the next day, Kit receives a phone call from the stalker threatening her death in the next month and she goes with Tony to the Scotland Yard, but Inspector Byrnes (John Williams) believes that Kit may be making-up the story to get more attention from Tony. Kit's Aunt Bea (Myrna Loy) arrives, but only Kit receives the phone call raising the question, is she losing her mind? Written by Claudio Carvalho, Rio de Janeiro, Brazil