Prosperous architect David Hunter, lives with his wife Evelyn, who loves gambling and admiration, as well as his small daughter Dora, and his sister-in-law Ruth. When Evelyn tells her husband she owes $10,000 in bridge losses, she promises not to gamble or see her lover, Stephen Dabney, again if he will pay the debt. Stephen's friend, Moira Lamson, however, entices her to the country club for one last game. David and Ruth, worried by her prolonged absence, go to the club where they find her in Stephen's arms. Evelyn accuses her sister of spying on her and demands a divorce from her husband. Ruth, weary of her sister's frailties, moves out of the household and takes up nursing. Evelyn's health suffers from the strain, and now with David and Ruth gone, she is ill and alone. David and Ruth take pity on her and return. A smarter Evelyn is reunited with David.

In the Roman Coliseum, at the beginning of the Christian era, the Emperor Turnerius, accompanied by his favorite, Nerissa, watches the bestial games in the arena. His son Gordian is asked by Grimaldo the magician to save the life of a Christian girl about to be thrown to the lions. He refuses, whereupon Grimaldo prophesies the fate of the Empire by telling the prince a story of the future: Two thousand years hence, in New York, a parallel situation takes place in which a young man is led to put a stop to the base plans of his father. The prince is so deeply affected by the injustice of the story that he plunges into the arena to save the girl, causing the emperor to die in a fit of rage, thus precipitating the coronation of his son as the new emperor.