Lou's boyfriend Carl arrives at Heartland with a couple of different proposals for Lou. His welcome, however, is both hot and cold.

Lou isn't pleased when a neighbouring rancher brings a pregnant mare named Melody to stay at Heartland. Ty is astonished when Jack asks him to join him on a cattle roundup.

Disaster strikes when the barn erupts into flames and Jack's badly hurt getting the horses to safety.

Amy finds herself working with the enemy when Ashley asks for her help. Amy's also preparing Spartan for the Fall Finale while Lou decides what to do about a job offer in New York.

Amy heads into the mountains to visit a First Nations horse healer named Victor Whitetail, and leaves with a new understanding about horses, her mom and herself.

Ty and Amy are finally forced to deal with their feelings for each other after a snowstorm strands them at Jack’s fishing cabin in the mountains.

In the hopes of impressing Ashley, Caleb takes lessons in bulldogging from former rodeo champion Tim, who stubbornly refuses to acknowledge that he may no longer have what it takes. Kit and Ty sort out their lingering break-up issues as Ty assists Scott with the delivery of Kit's mare's foal. Lou invites Peter to manage his business from the Heartland facilities while his office undergoes renovation, and lives to regret it.

Ty and Amy clash over how best to raise an orphaned foal. Lou must defuse a potential lawsuit after fending off unwanted advances from an unscrupulous business client. Meanwhile, Val tries to connect with her newly-reconciled daughter Ashley and a cougar stalks the Heartland area.