After a psychoanalyst unsuccessfully tries to convince four sisters that they are not 200 year old vampires, the Queen of the Vampires promulgates the cause of the Undead.
| Directing | Jean Rollin | Director |
| Production | Jean Rollin | Producer |
| Writing | Jean Rollin | Screenplay |
| Camera | Guy Leblond | Director of Photography |
| Writing | Alain Yves Beaujour | Writer |
| Production | Sam Selsky | Producer |
| Sound | François Tusques | Original Music Composer |
| Sound | Yvon Géraud | Original Music Composer |
| Art | Alain Yves Beaujour | Art Direction |
| Editing | Jean-Denis Bonan | Editor |
