It is very difficult to follow the plot, but a guess is that a hospital (the 'Clinique des Ormeaux') is supplying young female patients to be kidnapped into prostitution, sampling the goods before they go.
Johnny
Bernadette
Marie
L'infirmière
Le docteur
M. Rodolphe
Patiente
Le policier
La prisonnière
L'acheteur
L'intermédiaire