Ruff Ballou and his sister Dixie journeyed west with trouble at their heels. But luck is on their side in Rum River, New Mexico, where they race one of their champion thoroughbreds to victory. A rich man's greed pits their good fortune against Ruff's life and they must take up a money-making challenge to capture Blue Bullet, the legendary stallion that no man has yet tamed. But their worst enemy is time. A bounty has been placed on Blue Bullet, dead or alive, and savage killers are out to collect that reward.