Fort Gardner was little more than a blockhouse and a stockade in the middle of indian territory. Private Keeting stood guard, and as a favor let his friend out to visit his girl, Amy. Lone Ranger approaches with Tonto, and has special orders to act on a secret mission. Why did the sentry lie about his friend who just left? What’s the secret mission all about? Arms and ammunition have been stolen from the fort, and Keeting is put in the spotlight to take the blame.
Lone Ranger has been prowling around, and believes Keeting to be an innocent player in the game. Amy seems to hold the key, but she has disappeared. Is there a way to lay a trap to lure out the guilty party of the thefts from the fort?
Hearing of the news of his friend being killed, will Keeting help in Lone Ranger’s plan, or will he cause problems by being too impatient and seek revenge on his own? Lone Ranger takes advantage of his mask to lead Mike into thinking that he’s an outlaw, looking to deal in stolen guns. As the trap unfolds, the secret of Lone Ranger’s mission is revealed, and justice is carried out.