A young engineer, Lucien Rombeau, is sent to the Sahara by the oil company that employs him, which wants to put an end to drilling that it considers unproductive. He ends up agreeing with the chief prospector, who refuses to stop the work and is convinced that prospecting will not be in vain.
| Actor | Role |
|---|---|
 Paul GuersLucas Rimbaud | Lucas Rimbaud |
 Jean ServaisWagner | Wagner |
 Magali NoëlLénq | Lénq |
 Jean DaurandBouthier | Bouthier |
 Jess HahnJeff Gordon | Jeff Gordon |
 Jean-Marie AmatoDuval | Duval |
 Georges AminelAhmed | Ahmed |
| HHarald WolffPeter | Peter |
 Robert PortePénélope | Pénélope |
 Pierre DorisJoubert | Joubert |
 Marcel BozzuffiGomez | Gomez |
| GGuy MairesseHans | Hans |
 René-Jean ChauffardPaulin | Paulin |
 Jean Le PoulainNot listed | Not listed |
 Georges GéretNot listed | Not listed |
 Jean DrozeNot listed | Not listed |
 Jacques FameryNot listed | Not listed |
| DDaniel CrohemNot listed | Not listed |
 André DumasNot listed | Not listed |
 Georges MontantNot listed | Not listed |
 Paul PavelNot listed | Not listed |
 Bernard Fresson(uncredited) | (uncredited) |
 Edward Fleming(uncredited) | (uncredited) |