Terry Dexter embezzles a large sum of money from his employer, John Grannan, and loses it in speculation, then tries to recover the money by gambling. His devoted sister Kathleen gives him securities to cover the loss, but Grannan refuses to accept them, hoping to teach Terry a lesson. The terror-stricken boy commits suicide, and Kathleen vows revenge on the employer. With the aid of James Twyford she becomes Grannan's secretary and persuades him to marry her, and after revealing her motive she elopes with Twyford, but Grannan defeats their plans. When Twyford tries to kill Grannan, he is foiled by Kathleen, who realizes her wrong and admits that she now loves her husband.