Penta Film
Aura Asia Argento, a young woman suffering from anorexia 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, but 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.In the end, it is revealed that Auras mother who faked her death after murdering her husband is the killer. Years earlier, Dr. Lloyd Brad Dourif was given the task of delivering Auras brother, Nicolas. However, his clumsiness combined with a power outage caused by a thunderstorm led to him slicing off the newborn infants head as he was being delivered. The head nurse during the delivery convinces the doctor to forcibly subject Auras mother to electroshock treatment against her will, hoping that it would erase all memory of the blotched deliverydeath of her son, allowing for the staff to cover up their causing her childs death. Holding the two hostage, Auras mother is ultimately killed by a young child who had discovered the mothers crimes and ultimately uses her own murder device against her to save her captives. ........
Source: Wikipedia