Captain Langdon of the Air Patrol forces Kelly, a suspected diamond smuggler, to land, but when he proves to be the wrong man, Langdon's suspicion is directed toward Michael Revere as leader of the gang. During an outing with his neighbor Mary Lacy, Revere finds Langdon parachuting from a plane in an apparently drunken state; in spite of Mary's intercession in his behalf, Langdon is dismissed and later offers his services to Revere as a ruse to aid in capturing the gang. Langdon is captured through Mary's innocent revelation of a secret message, but she discovers Revere's perfidy and Langdon's real purpose; they are captured, and Mary is forced to escape with Revere; but Langdon is freed by an erstwhile detective and overpowers the smugglers in his airplane.