When an aircraft carrying British children who are being evacuated from a war zone crashes on a remote island, killing all adults, the children realise that they will have to survive on their own and no one knows where they are.
They begin life on the island full of excitement, but gradually the order they tried to create breaks down. The civilised schoolboys become savages.
Ralph and Piggy meet on the beach, having survived the crash. They introduce themselves, then enjoy swimming in a lagoon. The island seems a magical place.
Piggy finds a large conch. Ralph blows it like a trumpet, and all the other boys who survived flock around. One group arrives in choir uniforms, led by Jack. The boys elect Ralph as their chief, so Ralph asks Jack to be leader of the choir, who will take the job of hunters. Piggy takes names.
Jack, Ralph and Simon explore the island to see if it is inhabited. They push a huge rock off the top of a hill, shouting with delight as it crashes down.
As they scramble back to the others, they see a wild pig. Jack gets out a knife to kill it, but can't quite bring himself to draw blood and the pig scurries away.