Early one morning, Kino wakes up from his brush house observing the scenery of his village in the Baja peninsula of Mexico. He has a wife named Juana and a Baby, Coyotito, who gets bitten by a scorpion. Juana asks a local doctor to heal him but the doctor refuses since Kino had no money. This could be viewed as a man vs. nature or man vs. society conflict since a lack of money could mean a social conflict and a scorpion bite is probably a natural conflict.
Kino and Juana realize that the scorpion's poison could kill their baby, so they need money desperately if they want to save their baby. Kino is a diver and on his dive that day, he comes up with a remarkably big oyster. He opens the oyster and finds a huge pearl that will make him rich. To be honest, no conflict happens in this chapter and is generally all positive.
Kino's finding has spread through the entire town, including to the doctor who heals the baby since he knows Kino is rich. Kino says he'll give him the money the next day when he sells the pearl. When he does try to sell the pearl, it doesn't end up too well. He tries to sell it to 3 pearl buyers but all say the pearl is nearly worthless and Kino thinks they are scamming him. That night somebody tries to steal the pearl but Kino scares them off. Juana suggests they throw the pearl away since it's bringing evil but Kino is clearly attached which could a man vs. self conflict.
Kino wakes up to Juana running out of the door of the house. Kino knows exactly what she's doing: throwing the pearl into the ocean. Kino runs after her and practically tackles her and beats her up. This would be a man vs. man conflict since there is physical conflict between Juana and Kino. As Kino walks away, he is attacked and manages to kill the man who attacked him. Juana kind of rubs her beating to the side and suggests to Kino they leave town before being arrested for murder. They go to Kino's brother's house to hide until they leave since their house burned down!
Kino and his family leave for the north since there are cities with pearl buyers there. While they walk on the road, they suddenly see three figures in the distance: trackers who will hunt them down. They leave the trail and go up on the mountain and hide in a cave. The trackers follow them and take rest near a pond nearby. Kino plans a sabotage on the men, but when Coyotito cries, the men think its a pup and shoot at it. Kino sabotages right as he shoots and defeats all three men when he realizes Coyotito is dead, which is man vs. man conflict.
Kino and Juana return to their town fatigue and bloody. People gather around to watch their return. They walk through the town in silence until they reach the gulf where Kino chucks the pearl that has brought him evil. The "song of the pearl" and it's essence disappears in the ocean.