The plane full of boys is flying through the air. The plane is falling down towards an island. The plane crashes on the island, and now the boys are stranded by themselves with no adults.
All the boys meet up on the island and get to know eachother. Ralph and Jack fight over leadership and hunting in order to survive. Ralph is Chief and Jack is leader of the hunters.
While the boys are hunting Simon goes off to tell Piggy alone. Simon discovers that the "beast" is just a dead man and heads back towards the hunters. When Simon gets back the boys are so caught up in their savagery act, that they end up ripping and killing Simon.
Roger drops a boulder from up above that pushes piggy off the edge. Piggy then falls off the mountain with the conch, dropping down to the rocks to his death. Now Ralph's best friend is dead and the conch is shattered.
All of the boys are so angry they have lost humanity and are turning to animals. Jack orders his tribe to kill Ralph. Ralph runs and hides to avoid being killed, the island is soon set on fire during the hunt.
The boys dont get to kill Ralph, theres a lot of smoke that the boys run through. The whole island is mostly on fire, Ralph makes it out with some other boys but find some rescuer adult to come and save them from the island. The smoke from i=the island signaled the rescuer.