With the Fall Finale only a few days away, Amy finds herself working with the enemy after Ben convinces Ashley that Heartland is the only place that can help her suddenly uncooperative horse.
Disaster strikes when the barn at Heartland erupts into flames and Jack is injured getting the horses to safety. Heartland may never be the same again after Lou discovers the barn isn't insured.
When Jack relents and allows Tim to visit Heartland, the simmering sibling rivalry between Amy and Lou heats to a boil.
Ty has a run-in with a cruel cowboy when the local ranchers round up some local mustangs for the veterinarian to test.
In order to drum up business for Heartland, Lou is organizing an open house. Amy is totally against it. After all, she's managed to drum up some high profile clients on her own.
Lou mistakenly sends Mrs. Roach's horse, Swallow, home before his fear of traffic is cured. An unknowing Ashley is violently thrown off when the horse is spooked by a truck.
Amy discovers a horse is being abused at Mallen's farm and convinces her mother to rescue him. On the way home, a raging storm sends their truck careening off the road.
Amy debates what to do when she receives money from an unexpected source.
Amy enters Spartan into an endurance race after realizing he's not ready to retire.
Hudson hosts a lumberjack competition and Amy must retrain a Clydesdale to compete in the draft horse race.
The man who shot Ty returns to Hudson and Amy and the rest of the family grapple with how to react.
Tim and Jessica's small party snowballs, while Lou struggles to hide a past relationship from the family.
Amy works with a challenging horse to help a friend of Clint's. She also revives a dream to rebuild the jumping course that she and Spartan practiced on so many years ago.
Quinn's wealthy father arrives at Heartland with a life-changing proposition for both Amy and his son.
Caleb finds a memento from the past that he thinks will have special meaning for Amy. But surprisingly, it's Jack who has some mixed emotions stirred up by the gift.
Tim seeks out help from an unlikely person when he finds himself competing in a polo match. Amy is concerned her daughter isn't adjusting well to her new reality.
A group of wild horses needs new homes. Amy must get back to her Miracle Girl roots and host her first horse clinic in over a year.
The wild black stallion that Amy rehomed from Will's ranch is brutally forced out of the herd by the new leader, leaving Amy to track down the injured horse and nurse him back to health.
Disaster strikes Hudson when a train derails and causes an explosion that threatens the town. A wild fire quickly spreads toward the rodeo grounds and Amy rushes to save the abandoned horses there.
Amy grudgingly helps Ty's mother Lily with a traumatized racehorse. Lou gets into even more hot water when she tries to sell Hudson as a "must-see" tourist destination.