In order to save her extravagant mother from bankruptcy, shame and scandal, young society girl Mildred Gower is forced to accept the proposal of Lemuel Siddall, a wealthy man she loathes.

A gang of blackmailers sends a cripple to San Francisco to expose a banker they have been blackmailing. However, the cripple meets and falls in love with the banker's daughter.

Captain Nemo has built a fantastic submarine for his mission of revenge. He has traveled over 20,000 leagues in search of Charles Denver - a man who caused the death of Princess Daaker. Seeing what he had done, Denver took the daughter to his yacht and sailed away.