Lieut. Ralph Harrison is in love with Major Marston's wife, who pretends to love him. Harrison's mother implores Capt. Jim Craig to intervene to save her son from dishonor. When Craig visits Mrs. Marston, Harrison appears, precipitating a quarrel during which Harrison is wounded in the shoulder. Craig then leaves, and the major discovers Harrison. The major kills Harrison, and places the blame on Craig. To avoid a scandal, Craig runs away. Madge Summers of the Secret Service tracks him down and the two fall in love, but Craig is arrested and taken back to the army post. Further evidence of his wife's infidelity causes the major to go mad. He murders his wife and confesses to the murder of Harrison. Cleared of dishonor, Craig finds happiness with Madge.