When rich Sybil Van Norden's father kills himself, his ex-partner, Richard Vaughan, cheated by Van Norden, cynically advises her to bluff her way through life. She marries Wallace Duncan for his money, but discovers that Duncan is broke and a bluffer also. They make money cheating at bridge with their rich friends. One of their victims, Western millionaire John Moran, is attracted to Sybil, and pays them to help his daughter Grace socially. Good-for-nothing Edmond Curtiss offers Duncan money if he will convince Grace to marry him, but Sybil, fond of Grace, gets the visiting Vaughan to warn Moran. When Moran discovers Sybil and Duncan cheating at cards, he locks Sybil in a room and struggles to embrace her. Vaughan breaks down the door and Moran leaves, after which Vaughan repentantly confesses to Sybil that he maliciously gave her the wrong advice. After Duncan dies in a fight with Moran, Sybil and Vaughan marry and have a child.