Cuatro balazos

A man named Joe (Henry in the Italian and Spanish versions) is mysteriously killed just as he is about to leave a small Kansas town with his girlfriend, Katy. At the inquest, one of Joe's old girlfriends claims she saw Katy shoot Joe. On this evidence alone, Katy is sentenced to 15 years in prison. Desperate, she attempts an escape, and her brother, notorious gunslinger, Frank Dalton, swears vengeance for his sister. All of a sudden, the town experiences an outbreak of murders.