Aura (Asia Argento), a young woman suffering from Anorexia nervosa, escapes from a psychiatric hospital and meets a young man, David (Christopher Rydell), who offers to let her stay with him rather than go back to the hospital; however, Aura is soon caught, and her return to the hospital coincides with the start of a string of murders of hospital staff members, past and present. The killer decapitates them using a homemade garrote device on rainy days. When her father is murdered along with her mother, Aura and David team up to find the killer.