Travellers in a stage coach talk as they share the ride with Hop Along Cassidy. After he arrives back at the Bar20, Hoppy gets a letter that his female travelling companion has had trouble on her arrival at Cinnabar. What kind of drama will he find when he goes to investigate? Water rights, and who controls them determines who will reign surpreme in the dry land of Cinnabar. A motivation that leads to murder.
By the time Hoppy can begin his investigation, the murderous activity has seemed to have stopped. It doesn’t mean that he won’t find suspicious behavior. Tense moments, and fist fights are in store as Hoppy and California put on the pressure. The mystery is solved, and Hoppy saves the day for his damsel in distress.