Prize-winning rider Nick Harwell stops by Heartland. Mallory discovers a crooked ranch-hand who plans to sell a herd of wild mustangs to a slaughterhouse.
Amy and Lou invite their dad for lunch while Jack and Lisa take a fishing trip. Ty practices his cattle-roping skills.
A barn fire brings life at Heartland to a halt, including Lou's plan to move back to New York. Jack is injured when the barn catches on fire.
Amy prepares for the upcoming jumping competition with Ashley Stanton at a horse show, and Spartan's abusive owner attempts to take him back. Ty's probation is finished and he is now free to leave Heartland.
