Two paintings are stolen. Amateur private detective Roland Gautier investigates.

Jean Debucourt
Imaneff

Andrex
The leader of the gangsters

Pierre Larquey
Father Simon
Simone Sylvestre
Irmène

Yves Furet
Detective Roland Gautier

Louis Seigner
Malvet

André Gabriello
Hector

Raymond Pellegrin
Jean Talais
Monique Arthur
Martine

Albert Duvaleix
Souliac
Colette Fleuriot
The florist

Ky Duyen
The Chinese
Lucien Hector
The valet

Léon Walther
The director of Beaux-Arts

Daniel Gélin
Saladin