A serial-killer frightens Paris by phoning young ladies at night, telling them insults about their lives. Minos, as he calls himself, wants to prevent the world from free women and he targets at first these ones. Commissaire Letellier is given the investigation and he has hard work with the maniac.

Jean-Paul Belmondoas Commissioner Jean Letellier
Charles Denneras Inspector Moissac
Adalberto Maria Merlias Pierre Valdeck / Minos
Rosy Varteas Germaine Doizon
Jean Martinas Divisional commissioner Sabin
Lea Massarias Norah Elmer
Jean-François Balmeras Julien Dallas, student
Catherine Morinas Hélène Grammont
Roland Dubillardas Psychologist
Henry Djanikas Police inspector