A raging wildfire threatens the ranch, forcing the Heartland family to evacuate, but when a pregnant mare is trapped in the fire's path, Amy risks everything to try to save her.

Amy must deal with the fallout when Lyndy's first 4-H show goes awry; Katie does something unexpected with Dodger.

Amy is confronted by memories of Ty when she returns to Pike River with Nathan to work with Search and Rescue horses; while Lou and Grace track down a wolf, Jack finds his new ranch hand.

Amy and Ashley hunt for a crashed plane while Caleb and Nathan battle nature and each other; Jack and Lisa coordinate traditional hay-gathering.

Amy's working with an Olympian's horse when Spartan's health suddenly declines; after her high-profile client questions her integrity, rumors threaten her reputation as a horse trainer.

The whole family heads to the Hudson Rodeo, where Amy puts everything on the line to save her reputation; Katie proves herself at her first big Hudson Wilds Flag Team performance.

As Amy helps an old friend of Nathan's overcome his fear of riding horses for his wedding day, she wonders what the future holds for her. Meanwhile, Dex must prove himself to Jack.

Lou leads a cattle drive while Jack helps a friend who's facing unexpected challenges; as Amy feels distant from Nathan, Lisa meets her sister Tammy.

While Amy secretly works with Gracie's new horse, Lou and Jack are determined to catch the rustlers, Dex confronts his past, and Georgie returns to Heartland.

Georgie grapples with Phoenix's situation as the rustlers' identities come to light; Amy and the Heartland family face crucial choices about what lies ahead.