A dangerous amnesiac escapes from an asylum, hides in the opera house, and is suspected of getting revenge on those who tried to murder him 13 years ago.

Based on the 1911 novel by Cynthia Stockley, this is the story of Dierdre Saurin, whose infatuation with Major Kinsella takes her to Africa where native uprisings and the jealous connivings of Maurice Stair await her.

Mrs. Penfield, better known as Penzie, is one of the inhabitants of a tenement neighborhood known as "the Custard Cup" because of its oval shape. Penzie is a widow who lost both her husband and son in the influenza epidemic of 1918 and 1919. She has found fulfillment by taking in three orphans. One of the Custard Cup's other residents is a counterfeiter, and when the police are too hot on his trail, he leaves a package with Penzie and sets a boat aflame when he tries to destroy some phony bills. When the gang is rounded up, Penzie -- who has been looking for one of her adopted children -- is found at the hideout and arrested.

Gibbs is a laborer at the docks who, through his hard work and good judgment, becomes a millionaire on Wall Street. He becomes acquainted with the Van Dusens, who have lost their fortune. Mrs. Van Dusen pushes her daughter Marie into a loveless marriage with Gibbs so that the family can retain its social standing. Gibbs realizes, however, that his money cannot buy his wife's affection.