Robert Strickland, the self-confessed murderer of Gerald Trask, refuses to defend himself on the witness stand. His attorney, however, cross-examines Strickland's wife.

Reared in a Turkish harem and threatened with marriage to a man she does not love, Carlotta escapes to London with an English adventurer. When he is killed, she is left destitute and attaches herself to Sir Marcus Ordeyne and begs his protection. He takes her home out of pity, and her charm and innocence cause him to fall in love with her. When he plans to marry her, Judith Mainwaring, who looks upon Carlotta as a rival, tells her he merely pities her and is marrying her to avoid a scandal. Carlotta runs away with Pasquale, a friend of Sir Marcus, though she loves her guardian. Later, Mrs. Mainwaring meets Carlotta in Paris and tells the girl the truth--that Sir Marcus is searching for her. Realizing his love for her, Carlotta is reunited with her benefactor.

Inconsiderate millionaire John Benson, philanthropist Oliver North, courageous Langdon Crane, wealthy idler Robert Curtis and Lydia Benson are among the passengers on an ocean liner that is sunk by a German submarine. Carried away by the currents to a tropical island, the castaways endure hardships which bring out their true natures.