After her initial shock at her grandfather's announcement, Lou throws herself into party planning mode and forces Jack into an awkward reunion with an old acquaintance. Ty becomes the middleman when Amy and Caleb butt heads over horse training. And still reeling from her recent discovery, Georgie pulls away from Amy and focuses on donating money to an online animal sanctuary

A surprise visitor at Heartland makes an unwelcome declaration and Amy is forced to deal with the devastating consequences. Meanwhile, a dire animal crisis at the Reserve eerily parallels Ty's personal life when he realizes that some things just can't be saved. Still stinging from Katie's pre-school rejection, Lou's insistence that a specialist test her daughter brings an unexpected result. And Georgie realizes she needs her own trick riding horse in order to keep up with her nemesis Olivia