

The two manage to swim safely to shore where they meet Cyrus, the local misanthropic pariah who holds a serious grudge against the islanders. Trapped in the sinking plane wreck, the father orders the boys to abandon him and save themselves. The plane gets caught in a storm and crash-lands near an uncharted island. Half-brothers Karl, a born rebel, and David, the more curious and scholarly of the two young men, are flying a small airplane over the ocean with their rich father.

After a plane crash, two opposing half-brothers find themselves on an amazing lost island where enlightened pacifist humans and intelligent talking dinosaurs have created a utopian medieval society.
