The Barton Family needs money to buy a new herd bull. Their only means to raise cash is to sell their young, wild mule. However, a gentle, tamed mule brings more money than a wild unbroken one. So, Daddy advertises the mule for sale, and then he begins gentling him. It proves to be more time consuming, and a more arduous task, then he expected. Much to Celly's dismay, and Beau's disappointment, the mule bucks Daddy off repeatedly. While he is still in the process of breaking in the mule, buyers arrive. Sheriff Longslim and Deputy Squatty pitch in to help. Finally, after much debate, haggling over price, and more mule-busting, a sale is made!