Sue Jennings and Tom Egan have been sweethearts, but Sue decides to marry another man, and holds a secret meeting with Tom, in which she returns his love letters and demands her own. On the same night, Jack Deming, a friend of Tom’s who has lost heavily in speculation on Tom’s advice, calls at the latter’s rooms, very much intoxicated, brandishing a revolver and vowing vengeance. Tom calms the excited visitor, who falls asleep on the couch, after which Tom writes a letter to his former sweetheart and dispatches it by his servant. When the servant returns, he discovers his master dead on the floor of his apartment and Jack just leaving the room revolver in hand. Jack is arrested on suspicion, and young Miss Marsh, a bright young woman in the detective department, is detailed from headquarters to investigate the case. She does some clever work in the case, and proves Jack’s innocence in a novel war, incidentally falling in love with the man whose life she is working to save. On the strength of her evidence, Jack is set free, and with her love to live for, he starts out to make a new record in life for himself.