A singing cowboy stumbles across an ancient underground civilization beneath his ranch.

Gene is saved a second before his car crashes; Queen Tika searches for Argo, who is trying to destroy Radio Ranch; Gene makes his broadcast from Frankie's laboratory; the kids are in an explosion.

After defeating the guards, Gene reaches the surface and takes Beetson's airplane; the Queen kills the engine.

Gene tries to stop the radium bomb sent by the Queen to kill the riders on the surface.

The Baxters find Gene in time to save him; Argo orders the death of all surface people; battling, Gene arrives at where the Queen is being executed, but is knocked into the path of death-dealing rays.