life while one of the predators is hot on his heels. During the attack, an avalanche of water, rock and mud caused by the eruption of a volcano that follows the attack slides down the bank. Scar climbs up the cliff, but loses his courage, and the Albertosaurus, injured in the eruption, begins to close in. Just as Scar sees the avalanche, he rushes up the cliff while the Albertosaurus is swept to its seeming death. Back in the Arctic, Patch tries to impress the female by dancing only to lose out to a more experienced male and the Edmontonia has found a last leaf. Suddenly, the log she stands on breaks apart and the Edmontonia slides down the snow on her back and crashes into a snowdrift, utterly helpless. Far away south, Scar tries to call for his family, but the only calls are the ones that didn't make it; the old male Edmontosaurus he has been traveling with and an injured female Pachyrhinosaurus. The Albertosaurus, having survived the mudslide, rises back to its feet and starting following Scar's trail again. Scar and the old Edmontosaurus walks on, but the older animal, suffering from a brain tumor, becomes more aggressive and nervous towards Scar, eventually even biting him. Scar sees the Albertosaurus first, and flees. The old bull Edmontosaurus fights the predator until they both tumble over the cliff, locked in a deadly embrace. In the frozen north, Patch learns how to finally catch Alphadons by listening for them under the snow and comes across the overturned Edmontonia. He and several other Troodons attack the ankylosaur, but the Gorgosaurus, now fully healed of its injury, arrives and pulls the herbivore away from the smaller predators. Struggling, the Edmontonia gets back up and injures the Gorgosaurus with her shoulder spikes. The Gorgosaurus heads back to its cave, fatally wounded with a broken leg. As the sun rises the next morning, Scar is becoming weaker and the Quetzalcoatlus that follows senses it. The young dinosaur hears a rustling noise, which turns to be the injured female Pachyrhinosaurus instead. The pterosaur gives up as the ceratopsian herd arrives to cross the river. Scar informs his new companions that he has been through this exact same kind of experience before. As they begin to cross the river, groups of Prognathodon arrive and pull many of them underwater. Scar dives in while the mosasaurs