Klaus murders women. After killing another girl, Klaus is spotted by his friend Kersten as he leaves his latest victim's house. Kersten gives him a ride and Klaus begins to plot the man's death. He's a witness, after all. Nobody else can say Klaus was there except Kersten. They decide to head to a party. Klaus' unhappy wife is there. So are a bunch of other people. Killing Kersten will be difficult. Then they all play a game called... Murder Party!
Magali Noël
as Eva Troger
Harry Meyen
as Klaus Troger
Götz George
as Kersten
Robert Graf
as Dr. Horn
Hanne Wieder
as Journalistin Cornelia
Wolfgang Reichmann
as Dr. Rosen
Anita Höfer
as Babsy Lenz
Georges Rivière
as Dahlberg
Margot Hielscher
as Claudia Ahrends
Wolfgang Kieling
as Kriminalinspektor
Heinz Klevenow
as Hauser
Uschi Siebert
as Margit Hauser
