Au Royaume des Cieux takes place in in a dreadful girls' reformatory. A couple of lovers will try to escape from this living hell.
Dora Nelson, a famous actress, leaves both her husband Philippe de Moreuil and the role she was playing in a movie directed by Nivert, to follow her lover Santini in Italy. But she soon realizes that Santini deceives her with a girl named Elsa. In vexation she decides to return to her husband and to her career. Unfortunately for her, Suzanne Verdier, a little working girl, has in the meantime replaced her not only in the film she had left unfinished but in her husband's heart as well. Dora eventually understands she must step aside.
A jeweler's clerk accidentally swallows a pearl worth three million. The jeweler accepts his marriage to his daughter if the clerk agrees to have the operation. The adventures follow one another until the day when the clerk admits that he has not swallowed the pearl, but as he has become a famous man, the jeweler accepts him as his son-in-law.