Join Littlefoot, Cera, Spike, Ducky, Petrie and shy newcomer Ali on their most exciting adventure ever! It's an all-new, song-filled, animated classic on the continuing story of 'The Land Before Time'. A herd of migrating Longnecks has important news of weather changes in the regions beyond the Great Valley. What was once dry land has become "The Land of Mists". Strange new creatures have begun to appear in these rainy marshes, while still others have moved into the high trees from which the Longnecks used to feed. Fortunately, the Great Valley is as beautiful as ever. There's no need to brave the wetlands - until Littlefoot's Grandpa becomes ill. His one hope is to eat the healing petals of a golden Night Flower that only grows...in the Land of Mists!