Roberto goes to Marseilles to give a hand to his friend Xavier, wrongly imprisoned following a frame-up organized by his associate Villanova. Roberto sets out to seduce Villanova's mistress, but when Villanova is killed, Roberto ends up leader of the band...

Jean-Paul Belmondo
as Roberto La Rocca

Christine Kaufmann
as Geneviève Adé

Pierre Vaneck
as Xavier Adé

Béatrice Altariba
as Maud

Henri Virlogeux
as Ficelle

Mario David
as 'Charlot l'élégant'

Pedro Serano
as Migli

Charles Moulin
as Cipriano

Jean-Pierre Darras
as Névada

Edmond Beauchamp
as