Margarita is found, naked and bloody in a luxurious house and is promptly taken to a mental institute. The doctors and nurses meant to take care of her aren't exactly who they seem and a mysterious figure, clad in black, circles the premise at night, offing nubile young women.
| Actor | Role |
|---|---|
 Lina RomayMargarita Martin | Margarita Martin |
 Nanda van BergenIrina Farkas | Irina Farkas |
 Michael MaienDr. Antonio | Dr. Antonio |
 Esther StuderPetra | Petra |
 Monica SwinnSandra Mauro | Sandra Mauro |
 Peggy MarkoffEmilia | Emilia |
 Kurt MeinickeDr. Farkas | Dr. Farkas |
 Brigitte MeyerGabi | Gabi |
| PPeter BaumgartnerInspector Risi | Inspector Risi |
| DDagmar BürgerPeggy | Peggy |
| LLy FreyHelga (uncredited) | Helga (uncredited) |
| RRandolf KronbergInspector Risi (voice) (uncredited) | Inspector Risi (voice) (uncredited) |