After an asteroid draws an astronaut and his ship to its surface, he is miniaturized by the phantom planet's exotic atmosphere.

It all begins with the discreet romance between the Creole maid Lea Mariotte and her young boss, George Brissac, an amoral bourgeois who plans to inherit his uncle's fortune and marry a young woman from a good family. After an incident where she kills a man, she is saved from the gallows by Fabian, a ship's captain, who has personal reasons for antagonizing the Brissacs. He takes care of her and falls in love with her, but doesn't tell her. She, in turn, takes the opportunity to return to her lover Brissac's arms, forcing him to marry her after seeing him murder his uncle.