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This suspenseful crime drama finds a jealous husband hiring a killer to murder his supposedly unfaithful wife. Donald Edwards (Michael Gough) imports the German hit man Kersten (Hans Borsody) to murder his wife Helen (Erika Remberg). He suspects her of having an affair with Robert (John Justin). The usually cold-blooded hit man first agrees to the assignment, but he soon becomes convinced that Helen is innocent of any wrongdoing. When he refuses to kill Helen, he is confronted by the irate husband, something which leads to an inevitable showdown. The feature was filmed in 1962.