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In this thrilling mystery of mistaken identity, Jacques (Pierre Vaneck) is a piano player in a nightclub who is approached by a man he never met before. The stranger offers him a job posing as the husband of a mentally challenged woman. He will be rewarded for taking care of the woman. Since his contract has expired at the club, he readily accepts the proposition. The stranger turns out to be the valet of the woman, who other than playing with decapitated dolls, seems quite normal. Jacques and the woman end up falling in love. He looks just like her husband who disappeared during an African safari. It turns out the missing man is a former Nazi hiding out from the international police. Soon agents converge on the house along with the man who had supposedly vanished, leading to an inevitable showdown.