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.

While trying to help Cass learn to handle a spirited horse, Amy discovers there is more riding on their success than she initially realized. Meanwhile, Tim insists the entire Heartland family attend a Hudson holiday party where Lou is forced to deal with a series of unexpected events, not the least of which is Peter's sudden appearance. When tragedy strikes at the Wildlife Reserve, Georgie risks her life to save a herd of miniature horses and Ty steps in to offer support when Bob's dream of expanding the Reserve goes up in smoke. Meanwhile, when Remi destroys his new fly- fishing bait supplies, Jack holds onto his grudge against the dog in order to win a bet with Lisa.