De biseksuele geliefden Diana en Regina runnen een privédetectivebureau met de veelbelovende naam 'Red Lips'. Terwijl Regina meer verantwoordelijk is voor de praktische zaken, is Diana gespecialiseerd in de romantische taken. Hun laatste opdracht: ze moeten het model Lida opsporen voor de deftige meneer Radek, zijn verdwenen geliefde. De enige aanwijzing leidt naar de mysterieuze kunstenaar Claus Tiller, die bekend staat om zijn 'delicate' schilderijen en sculpturen.
Nee, helaas is Rote Lippen, Sadisterotica nog niet beschikbaar op Netflix in Nederland.
| Writing | Luis Revenga | Screenplay |
| Writing | Jesús Franco | Screenplay |
| Directing | Jesús Franco | Director |
| Camera | Joachim Jung | Still Photographer |
| Camera | Franz Hofer | Director of Photography |
| Production | Adrian Hoven | Producer |
| Production | Pier A. Caminnecci | Associate Producer |
| Editing | Francisco García Velázquez | Editor |
| Sound | Jerry van Rooyen | Music |
| Production | José López Moreno | Producer |
| Writing | Karl Heinz Mannchen | Story |
| Camera | Jorge Herrero | Director of Photography |
| Editing | María Luisa Soriano | Editor |
| Directing | Vicente Molina Foix | Assistant Director |
| Directing | José Manuel Goyanes | Script Supervisor |
| Production | Karl Heinz Mannchen | Production Manager |
| Camera | Eduardo Pérez Climent | Assistant Camera |
| Costume & Make-Up | Manolita G. Fraile | Makeup Artist |
| Costume & Make-Up | Josefina del Barco | Assistant Makeup Artist |
| Art | Tomás Fernández | Construction Coordinator |
| Production | Jesús García Gárgoles | Production Supervisor |
| Art | Carlos Viudes | Art Direction |
| Art | Vicente Criado | Assistant Set Decoration |
| Art | Graf Pilati | Art Direction |
| Art | José Luis Bermúdez de Castro Acaso | Property Master |
| Production | Ramón Escribano | Production Assistant |
| Directing | Luis Revenga | Assistant Director |
| Editing | María Elisa Valero | Assistant Editor |
| Directing | Elfriede Schmidt | Script Supervisor |
| Camera | Pedro Martín | Camera Operator |
| Costume & Make-Up | Magdalena Fernández | Wardrobe Supervisor |
| Production | Salvador Casado | Production Assistant |
| Sound | Fernando García Morcillo | Music |
