When snow falls in the Valley for the first time, everyone is enchanted by the phenomenon, but it's not long before they all realize that these fluffy white flakes threaten their survival. Littlefoot, Cera, Ducky and Petrie are also worried about Spike, who has decided to join a visiting Stegosaurus herd that is heading out to escape the freeze. When Ducky secretly follows Spike to the Mysterious Beyond, Littlefoot, Cera and Petrie decide to brave the icy weather to bring back their missing friends.