People on a train get murdered. Who is the murderer? Everybody on the train is a suspect. One of them is the homosexual dope fiend played by Heinz Hopf. Things might get out of hand in this exciting thriller in true Hitchcockian style.
On a tourist trip abroad the passengers on the coach witness an assassination attempt on the President Hurkas. One of the tourists has evidence against the perpetrators, and is killed when the coach reaches Sweden. Another passenger observes how one of the perpetrators is picked up by a yellow car. She is kidnapped and locked up in a mental hospital.
Susanne is a woman in her mid-30s and the owner of a modeling agency in Stockholm. She accompanies her prize model, Doris, on a trip to Gothenburg so that Doris can be photographed. While traveling, both women seek out romance, Susanne with a married lover and Doris with an older gentleman who sees his deceased wife in the young model. The two women struggle to understand their romantic motivations and in the process form an unlikely friendship.