Below the Surface (1920 film)

Below the Surface is a surviving 1920 silent film directed by Irvin Willat and starring Hobart Bosworth. Thomas H. Ince produced the picture with distribution through Paramount Pictures.

Based upon a description in a film magazine, Martin Flint Bosworth and his son Luther Hughes are partners in a deep sea diving business, and a promoter tries to interest them in a fraudulent scheme to extract treasure from a sunken wreck. The father declines, but the son accepts, attracted by a young woman with the promoter, whom Luther then marries. She later leaves him, and Luther becomes delirious, so the father goes to an underworld dive in an attempt to get her back. Later, a steamer sinks after a collision with a derelict, carrying the promoter and Luthers wife to their deaths. Luther refuses to accept his fathers story that the woman was worthless, and dives on the sunken steamer only to discover his wife embraced in the arms of her lover.

Source: Wikipedia