Lucas and Mark are on their way to the county fair, when they encounter Micah with a condemned prisoner that he is transporting to the territorial prison for execution.
The prisoner once saved Mark\'s live, and the boy feels he owes him a debt. When Micah and Lucas are distracted, the prisoner escapes, and Mark says nothing.
Angry, Lucas leaves Mark with a neighboring farmer while he and Micah hunt down the escapee. After they leave, the escapee surprises Mark and the farmer. Mark is ordered to fill a couple of canteens with water, but fills them with kerosene, instead.
Upon discovering the kerosene in the canteens, the escapee, on his way to Mexico, detours to a ghost town, where fresh water is available. To keep Mark out of trouble, the escapee ties him up in the saloon, and leaves him some light by placing a kerosene lantern on a table.
Attempting to get loose, Mark knocks over the table and the lantern, and starts a fire. Seeing the smoke, and hearing the boy\'s cries for help, the escapee runs into the saloon, and rescues Mark, just as Lucas and Micah ride up.
For saving Mark a second time, Micah and Lucas talk to state officials, and get the prisoner\'s sentence reduced from hanging, to life imprisonment.
In all, not a bad episode. It was exciting and well acted, and plausable, unlike some other shows of the era, which stretched credibility to the limit.