All is well with Kino, Juana, and Coyotito until Coyotito is bitten by a scorpion while laying in his hanging box. When they go to see the doctor, he blatantly refuses them because they don't have enough money.
The swelling on Coyotito's shoulder goes down. and Kino goes pearl diving and finds the Pearl of the World, which is as big as a seagull's egg!
Everyone in the town wants Kino's pearl, and will do anything to get it. In the pearl, Kino sees that he and Juana will be married, they will have new clothes, Coyotito will go to school, and Kino will have a rifle.