In the midst of a raging war, a plane evacuating a group of schoolboys from Britain is shot down over a deserted tropical island. Two of the boys, Ralph and Piggy, discover a conch shell on the beach, and Piggy realizes it could be used as a horn to summon the other boys. Once assembled, the boys set about electing a leader and devising a way to be rescued. They choose Ralph as their leader, and Ralph appoints another boy, Jack, to be in charge of the boys who will hunt food for the entire group.
Ralph, Jack, and another boy, Simon, set off on an expedition to explore the island. When they return, Ralph declares that they must light a signal fire to attract the attention of passing ships. The boys succeed in igniting some dead wood by focusing sunlight through the lenses of Piggy's eyeglasses. However, the boys pay more attention to playing than to monitoring the fire, and the flames quickly engulf the forest.
A large swath of dead wood burns out of control, and one of the youngest boys in the group disappears, presumably having burned to death.
At first, the boys enjoy their life without grown-ups and spend much of their time splashing in the water and playing games. Ralph, however, complains that they should be maintaining the signal fire and building huts for shelter. The hunters fail in their attempt to catch a wild pig, but their leader, Jack, becomes increasingly preoccupied with the act of hunting.
When a ship passes by on the horizon one day, Ralph and Piggy notice, to their horror, that the signal fire--which had been the hunters' responsibility to maintain--has burned out. Furious, Ralph accosts Jack, but the hunter has just returned with his first kill, and all the...