The Ice Age Adventures of Buck Wild

Concerned about the two possums Crash and Eddie, Ellie, their woolly mammoth sister, calls for them, but they refuse to listen, calling themselves independent possums. They accidentally cause an avalanche and destroy the gang's summer camp. Manny, Ellie's husband, scolds Crash and Eddie for their recklessness and irresponsiblity, with him and the rest of the herd declaring they would not survive on their own. Wanting to prove them wrong, Crash and Eddie sneak out and leave the new camp. Finding Crash and Eddie gone the next day, Ellie insists that they leave to go find them. Crash and Eddie stumble upon the entrance to the Lost World, a land where all dinosaurs survive, and quickly get in trouble with two raptors trying to eat them. Breaking away, they run into Buck Wild, who helps them escape and tells them that a frilled dinosaur named Orson, who has a big brain, has escaped from exile and has come to conquer over the Lost World. Buck tries to get Crash and Eddie back to their home, but figures out a boulder is covering the entrance to the Lost World. Orson appears and says that he sealed the exit.