Albert is an eccentric inventor of missiles who comes under fire from his investors when his first prototype explodes. Even his sympathetic mistress has her doubts, as Albert lashes out in a verbal tirade condemning those of little faith in his genius.

Jean Gabin
as Albert Raynal

Suzanne Flon
as Christine Raynal

Colette Deréal
as Rolande

Raymond Gérôme
as Jérôme Laprade, le beau-frère et financier d'Albert

Michel Auclair
as M. Magnin, le banquier d'Albert

Alfred Adam
as M. Vacher, l'important ferrailleur

Jacques Monod
as M. Marchal, un financier d'Albert

France Valéry
as Gilberte Magnin, la femme du banquier

Marthe Alycia
as Mme Laprade mère

Étienne Bierry
as M. Lambert, fidèle collaborateur d'Albert