Miguel, a horribly disfigured young man, goes on a rampage at a masquerade party and rapes and then mutilates a girl. Institutionalized at a mental asylum, he is released five years later, into the care of his sister, Manuela who, along with their wheelchair bound mother operates a boarding school for young women. Miguel becomes obsessed with one of the girls at the school, and wants to resume his incestuous relationship with his sister.
| Directing | Jesús Franco | Director |
| Production | Wolf C. Hartwig | Producer |
| Production | Otto Retzer | Executive Producer |
| Directing | Lina Romay | Assistant Director |
| Writing | Erich Tomek | Screenplay |
| Art | Klaus Haase | Art Direction |
| Costume & Make-Up | Rolf Albrecht | Costume Design |
| Camera | Juan Soler | Director of Photography |
| Editing | Christine Jank | Editor |
| Sound | Gerhard Heinz | Original Music Composer |
| Editing | Karl Aulitzky | Editor |
| Costume & Make-Up | Lore Sottung | Makeup Artist |
