Bloody Moon German Die Sge des Todes, literally The Saw of Death also known as The Bloody Moon Murders is a 1981 German slasher film directed by Jess Franco.
Miguel, a young man with a horribly disfigured face, attempts to trick a girl into sex by pretending to be someone else. When this fails he brutally hacks up the young woman with a pair of scissors. After the crimes, Miguel is institutionalized at a mental asylum for five years.When his sentence is finished, he is released into the care of his sister, Manuela. Along with their invalid aunt, his incestuous sister Manuela operates a boarding school for young women, called Europes International YouthClub Boarding School of Languages, on the Spanish resort of Costa Del Sol. ........
Source: Wikipedia