It's December, and Amy can't help but remember the last holiday she spent with her mother. Back then, Amy was training Sundance, the feisty pony they had rescued from an auction. While Sundance had proven to be a talent in the show ring, he was still impossible to handle in the stable. Frustrated by the pony's attitude and her mother's rigorous training schedule, Amy is lacking holiday - and Heartland - spirit. But then, Sundance falls ill. As Amy waches over him, she is finally able to glimpse the vulnerable pony's true heart - and understand the precious gift she shares with her mother.