The musical dinosaurs from the Great Valley are back for another song-filled adventure. Littlefoot (voice of Alec Medlock) dreams that he has found a land filled with brontosauruses like him. When he tells his grandparents (Kenneth Mars and Miriam Flynn) about the dream, they take it as a sign that they should set out and look for the land Littlefoot is describing. After many days of travelling, they are thrilled to discover a new world where longneck dinosaurs are in abundance. Then, when they run into his long-lost father, Bron (Kiefer Sutherland), who vanished before Littlefoot was born, the little brontosaurus is faced with a life-changing decision: stay behind with his newly rediscovered father, or go back with the grandparents who have cared for him all his life and be reunited with his friends.