A group of holiday-makers arrive at Cortina d'Ampezzo, an Alpine village in the Dolomites. Among them are an American Doctor who does not pay much attention to his wife and an Austrian Lieutenant, who decides to seduce her. He manages to befriend the couple so that, when the Doctor has to leave to help a local physician, he asks the Lieutenant to look after his wife. When the Lieutenant becomes too pressing, she promises to leave with him but asks him to give her more time. During the night, she puts a letter under the door of his bedroom.