The Lone Ranger and Tonto stumble upon a war party being formed by the great indian chief, Geronimo. Geronimo's hatred of white men, especially Soldiers, is well known. Tonto learns Geronimo plans to attack a nearby Army garrison under the guise of the flag of truce. The Ranger takes this information to Captain Ruddy, commander of the fort. The Masked Rider and Captain Ruddy form a plan - a plan that leaves only the Lone Ranger, Tonto, and one Soldier, Lieutenant Peterson, to face Geronimo and his war party!

EDIT: Due to an error in my records, this episode has appeared sooner than it should. The correct date of this episode is 6/29/1938, not 6/9/1938.