Roy Rogers and the Sons of the Pioneers tell the story of Pecos Bill, an infant who fell out of a covered wagon and was discovered and raised by a family of coyotes. His relationship with the coyotes teaches him survival and, as a result, grows up to become a he-man of the American Desert earning the friendship of a horse named Widowmaker after rescuing him from a flock of buzzards. However, the relationship between man and horse is threatened when Pecos falls in love with a dame named Slue Foot Sue. They plan to wed but the marriage is threatened when Pecos offers Sue a ride on Widowmaker.