Littlefoot and his friends return in another adventure. But this time, they aren't the smallest dinosaurs in the valley anymore.

A bedtime story leads Littlefoot and his grandparents on a journey to a new land, where Littlefoot discovers someone who vanished before he was born: his father! Now Littlefoot must decide ...

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 ...