Ralph and Piggy meet up on the beach and find a conch, Ralph ends up blowing it to call the rest of the boys on the island.
All the boys make a fire on top if the mountain, Ralph doesn't pay any attention to other things except the fire. Piggy tries to speak but Jack keeps telling him to shut up and that the conch doesn't count on top of the mountain.
Jack is starting to get obsessed about killing a pig while Ralph wants to focus on a signal fire.
On the left side, the boys are killing Simon because they thought he was the beast. On the right side, Ralph dodged a boulder which then hit Piggy off the cliff and smashed the conch.
Jack's tribe chases Ralph by setting the forest on fire. Ralph fights his way through Jack and his hunters and ends op on the beach lying down.
After Ralph ended up on the beach lying down, he looked up to see a naval officer standing over him. When they got saved, the officer heard about what happened he questioned how these English boys could've lost all form of rules and order in such short time.