Fact1: leaf-gobblers have left path of devastation behind them, Fact2: Cera 's father and Littlefoot 's grandfather argue over changing course, Fact3: Littlefoot leads friends off in wishing to be separated night, Fact4: Petrie being terrified of Big Water to act as lookout, Fact5: Sharptooth hatched in care before returning to parents in second film
Output: After a swarm of leafgobblers descends upon the Great Valley, devouring all plants and leaving it a barren wasteland, the inhabitants must seek another place where they can survive until the plants in the Great Valley have grown back. However, the leafgobblers have left a path of devastation behind them, leaving no food for the dinosaurs to find. After searching for many days, tension enters the group as Ceras father and Littlefoots grandfather argue over changing their course, which sparks a fight between Littlefoot and Cera. The fight soon breaks up when Ceras father announces that each herd will go its own way the next morning. Not wishing to be separated, Littlefoot leads his friends off in the night, in the hope they can find food before they are caught. They leave a trail for the grownups to follow, and eventually reach the Big Water. Although they are disheartened by the undrinkable water, they spy a verdant island connected to the mainland by a thin land bridge. On their way, an earthshake occurs, causing it to create a tsunami, which they narrowly escape. They quickly tuck in to the plentiful bounty of the island, but are then horrified to discover the tsunami has destroyed the land bridge. Isolated on the island, they try out Ceras idea to return by using a log as a boat. The plan initially works well, despite Cera suffering seasickness and Petrie being too terrified of the Big Water to act as lookout. However, a swimming sharptooth attacks, and in the confusion and fright which follows, they end up on the island again. That night, they remember their families, while the herd, who followed the trail, sleep on the shores of the beach on the mainland, worrying for them and Ceras father blames their leave on Littlefoot. The next morning, the children wake up to the shadow of a Sharptooth. They take off, but find themselves cornered by high cliffs. They huddle together when the sharptooth approaches, only to find that it is Chomper, a young Sharptooth who hatched in their care before returning to his parents in the second film who has also surprisingly learnt how to talk like the children. Whilst Chomper takes them to a safe refuge to hide from his parents, Ducky is kidnapped by a Sharptooth Flyer, but manages to escape before she can come to any harm. Chomper hides the children in foul smelling plants, and provides them with leafy food upon their request. However, an overcautious Cera openly displays distrust to Chomper because he is a Sharptooth, which grieves him, and he departs. Littlefoot follows him and apologizes, but is interrupted by Chompers mother. She nuzzles him, then leaves. Littlefoot is intrigued by her display of love to Chomper. Meanwhile, a different Sharptooth living on the island finds and chases the children. Chomper tries to help, but the Sharptooth overcomes him. Fortunately, his parents come to the rescue and battle the Sharptooth near the edge of the island, during which he falls into the Big Water and takes Chomper with him, much to his parents shock. Littlefoot plunges in to save Chomper while the Sharptooth is swept away by the current. Another swimming Sharptooth appears, but they discover it was an Elasmosaurus named Elsie who then saves the two from drowning. She returns them to the island, where Chompers grateful family promises never to harm the children; Chompers father grudgingly admits that, after sniffing Spike who had eaten some of the foulsmelling hideout anything that smelt that bad wouldnt taste very good anyway. Chompers mother also nuzzles Littlefoot, in gratitude for his actions to save Chomper from drowning. Cera realises and accepts that not all Sharpteeth are so bad and monstrous as she thought. Elsie offers to take them across the sea, so Chomper and his parents happily bid them farewell, promising that they will see each other again. When back on the mainland, they find that the herd found a lush, green, little sanctuary on the shore to stay in until the Great Valley becomes fertile again.