A young nude-model is violently stabbed to death with a pair of scissors. It soon emerges that three other women have already fallen prey to this unknown maniac, and that all three victims have a single and unique connection: they all served as models for an eccentric photographer named Parisi. When another young woman with a date to be photographed is murdered, her journalist boyfriend decides to investigate the crimes and quickly finds himself mixed up with Parisi, who reveals that he's working on a camera capable of photographing people's thoughts!