A young woman (Cristina Galbo) is sent to a school for young ladies that is run very strictly by the headmistress (Lilli Palmer) who treats it like a prison and has a strnage son (John Moulder-Brown) living on site. Some girls are thought to have escaped, but are actually being killed by a serial killer stalking the school. This is a good Spanish horror, originally released as La Residiencia, and is made by the performance of Lilli Palmer as the strict headmistress. The production helps build the tension with good interplay between the girl pupils.