Students of the prestigious dance school are dying under mysterious circumstances. Inspector Michel Eparvier suggests that the cause of death for women is physical exhaustion for dance lessons as their teacher Wolf brings the girls to exhaustion, making them to practice the technique of movement over and over again.
| Actor | Role |
|---|---|
 Alain DelonAlan Wolf | Alan Wolf |
 Claude BrasseurL'Inspecteur Michel Eparvier | L'Inspecteur Michel Eparvier |
 Patrick DupondChico | Chico |
 Tonya KinzingerDaphné | Daphné |
 Marina SauraElla Cebrian | Ella Cebrian |
| IIñaki AierraMoreno | Moreno |
 Consuelo De HavilandLiselotte Wagner | Liselotte Wagner |
 Etienne ChicotCommissario divisionale Le Guellec | Commissario divisionale Le Guellec |
 Paul-Loup Sulitzerl'uomo nella foto | l'uomo nella foto |
 Jacques PisiasKarim | Karim |
 Marian Filalila piccola ballerina | la piccola ballerina |
| SSacha GordineNevis | Nevis |