Determined to own the biggest spread in the territory, James Grayson has his henchman murder the Pecos brothers, and steal the deed to their ranch. Only eight-year-old Donald Pecos survives. His dying father gives the boy his pearl-handled gun, and charges him to, one day, avenge his murder. Years later, Grayson dominates the territory with proceeds from the gold mine he took over with the Pecos Ranch. But his empire begins to totter when his gold shipments are repeatedly stolen by a notorious bandit witha pearl-handled gun - The Pecos Kid!