Amy and Cassandra work together to save a racehorse with a career-ending condition, while the arrival of a former girlfriend - Janice - forces Tim to see his current relationship with Casey in a new light. Meanwhile, Georgie does a favour for Olivia and it completely backfires, threatening Adam's campaign for class president.

When Lou returns from New York she is forced to confront two interlopers: Heartland's new ranch hand, and a trendy food truck that is threatening Maggie's business. Meanwhile, Amy struggles to help a challenging client regain her confidence. Then, after Georgie insists that she and Adam are nothing more than "friends," she is devastated when she sees him at a party with another girl. And Tim makes a difficult decision about his future.