According to legend, Roy Parker's Great Uncle Butch Cassidy died under a hail of bullets in Bolivia. But when young Roy discovers a treasure map carved in an old belt buckle that belonged to Cassidy he unearths his Uncle's true fate. Could there be a chance he made it back to the States with a fortune in gold? Determined to find Butchs' stash of buried treasure and redeem the family name, Roy sets out on the adventure of his life with the help of his best friend, his arch rival and the girl of his dreams. But when an evil museum curator discovers the existence of the map, Roy and his friends must hurry to find the treasure before the dastardly villian gets his hands on the fabled loot.