A Federal spy operating within the Confederate lines, meets Hallie Coburn, a fair Southern girl, with whom he falls in love. The Spy enters into the social life. At a garden party he again meets Hallie and they become better acquainted. Gradually their acquaintance ripens into love. Hallie innocently takes the spy into the Confederate camp where he obtains needed information. Suspicion however has become directed towards him and on his attempt to invade the camp alone at night is discovered by one of the pickets and captured. He, however, makes a logical explanation of his presence in the camp and is allowed to depart. As he is leaving the spy unconsciously gives a military salute and the commander looks after him with a worried look on his face and a feeling that he is not what he claims to be. Hallie is summoned to military headquarters and told that her lover is suspected of being a spy.