In 1852, recently orphaned, thirteen-year-old Mateo becomes an 'arreiro,' or mule driver, bringing supplies to California gold miners and searching for the notorious bandit who stole his horse,
but when he learns that Yankee squatters are threatening to take the ranch he grew up on, Mateo heads for home.Recently orphaned Mateo becomes an 'arreiro,' leading pack mules through gold rush
camps and searching for the bandit who stole his horse, but when he learns that his father's old ranch is in danger from squatters, he heads home.