This Mascot movie serial stars John Wayne as Larry Baker, a commercial pilot and son of a railroad engineer. When his father's train is derailed causing his death, Baker sets out to track down "The Wrecker", a mysterious figure who has been sabotaging the L & R Railroad. Assisting Baker on his quest for justice is Gloria Martin (Shirley Grey), the daughter of a man wrongly accused of the crimes and who is looking to clear her father's name.

Episodes: (1) The Wrecker (2) Flying Pirates (3) The Masked Menace (4) Buried Alive (5) Danger Lights (6) The Airport Mystery (7) Sealed Lips (8) Outside the Law (9) The Invisible Enemy (10) The Wrecker's Secret (11) Wings of Death (12) Unmasked