A series of crimes is being perpetrated around a famous singer. Strangely, during each of the crimes, the artist's voice is heard humming his favorite song. Suspicions lead to a chase through a nocturnal Paris, ending in a disused theater where the assassin has lured his final victim.
Inspector Pascal
Thérèse
Marny
Dalbret
Eliane Roy
Mireille
Melor
The hunter
Mrs. Lalorgue
Legal
Bernard
The apprentice
Planquine
Marcheau
Toby
Self
(uncredited)
(uncredited)
(uncredited)
(uncredited)
Louise Chabot (uncredited)
Journalist Deval (uncredited)
