Tom Devon, alias Reginald Briand, is the mastermind behind an organization of gentlemen thieves, including Jimmy Stevens and Rudolph Gambier. Jimmy falls in love with Tom's innocent daughter, Gloria, after he rescues her from an embarrassing scene in a restaurant. Tom disapproves of the romance and decides to dissolve the partnership. When an embittered Rudolph kills Tom he frames Jimmy, but Gloria is determined to clear him. Posing as a thief, she seeks the truth.

Karl Alfred Karlsson goes on an adventure on the seven seas.