Jim Cooper is a 16 year old rider who joined the Pony Express for the excitement it promised.
Whilst on a routine courier run Jim comes across the unfolding drama of a young boy facing a puma. Jim decides to intervene, not for the excitemen, but in an attempt to save the boy's life.
He gives his horse to the younger lad and walks to the next relay station.
Two weeks later Jim's ride is bitten by a rattlesnake and he is thrown ... once again finding himself without a ride, but this time with a surprising outcome to his predicament.