Saimin (2000)

A string of mysterious deaths has occurred, leaving all of the victims with a purple butterfly-shaped bruise. According to investigators, the victims have all died from a hypnotic suggestion. The police bring in renowned psychiatrist Toshiya Saga, who specializes in hypnotic cures, to help with the investigation. He is determined to solve the mystery, but is caught off-guard when the woman he is attracted to becomes a suspect in the investigation.