When Littlefoot grandfather falls ill, The dinosaurs only way to cure him is a flower in the forbidding land of mist which hold unexpecting perils and danger.

Littlefoot and his friends sing new songs while enduring a blizzard. Animated.

Littlefoot befriends with a mysterious, fun-loving dolphin-like creature named Mo, who is trapped in "new water" caused by heavy rain. The gang then goes on an adventure to the "big water" to bring Mo home.