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