A plane crashes on a desert island. The only survivors are a group of schoolboys. By day, they explore the dazzling beaches, gorging fruit, seeking shelter, and ripping off their uniforms to swim in the lagoon. At night, in the darkness of the jungle, they are haunted by nightmares of a primitive beast. Orphaned by society, they must forge their own; but it isn't long before their innocent games devolve into something far more dangerous . . .