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

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

In Murania, Lord Argo is planning a revolution while on the surface, Gene flees from the Sheriff in a car without brakes.

(Chapter 5)

The Queen orders Gene to tell her who saved him, but he refuses; after Gene sees the kids, he tells the Queen that it was Argo; the Queen is shocked, but forms an alliance with him and orders death to Argo.