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Tomas Milian portrays a cheating husband named Stefanio who falls into a strange relationship with the bohemian Count Mateo (Pierre Clementi) in this intriguing thriller. Earning his trust, Mateo lures Stefanio into a sick psychological game, offering to murder his wife so that the unhappy businessman can be free to pursue his beautiful mistress (Katia Christine). In return, he continues, Stefanio must kill Mateo's brother. Stefanio laughs off the suggestion until the day that his wife is actually murdered and he becomes the prime suspect. As Stefanio's troubles increase, Mateo applies more pressure, finally forcing his frantic, desperate victim to fulfill his part of the bargain. Fine performances and some blatantly Hitchcockian moments in Fulvio Gicca's screenplay help to make director Maurizio Lucidi's film tense and absorbing, if somewhat predictable.