As a late moon rises outside, nearby motion rouses Kino from his sleep. In the pale light, he is barely able to discern Juana, who moves toward the fireplace, quietly gathers the pearl, and sneaks out into the night. Kino stealthily follows her as she heads toward the shore. When she hears him in pursuit, Juana breaks into a run, but Kino apprehends her just as she is preparing to hurl the pearl into the water. Grabbing the pearl from her, he punches her in the face and kicks her in the side when she falls down. As Kino hovers over Juana, the waves break upon her crumpled body. He hisses menacingly above her, then turns in disgust and leaves her without a word.
As Kino makes his way up the beach, a group of men assaults him. Kino struggles violently as they paw and prod at him. As Kino drives his knife into one of his attackers, the men knock the pearl from his grasp. Meanwhile, some distance away from the fight, Juana gets up on her knees and begins to make her way home. Climbing through the brush, she sees the pearl lying in the path. She picks it up and considers returning to the sea to discard the pearl once and for all.
At this moment, Juana spies two dark figures lying in the road and recognizes one of them as Kino. In the next instant, Juana realizes that Kino has killed the man slumped by his side. Juana drags the dead body into the brush and then helps Kino, who moans about losing his pearl. Juana silences him by showing him the pearl and explains that they must flee immediately because Kino has committed a horrible crime. Kino protests that he acted in self-defense, but Juana argues that his alibi won’t matter at all to the authorities. Kino realizes that Juana is right, and they resolve to flee.
While Juana runs back to the brush house to grab Coyotito, Kino returns to the beach to ready his canoe for the escape. He finds that someone has punched a large hole in the boat’s bottom. Filled with sorrow and rage, he quickly scrambles back to his brush house, moments before dawn. As he arrives in the vicinity of the neighborhood, he notices flames and realizes that his house is burning. As he runs toward the fire, Juana meets him with Coyotito in her arms. She confirms that their house has been burned down completely. As the neighbors rush to control the fire and to save their own houses, Kino, Juana, and Coyotito duck between the shadows and into Juan Tomás’s house.
In the darkness inside Juan Tomás’s house, Kino and Juana listen as the neighbors attempt to subdue the fire and speculate that Kino and Juana have been killed in the blaze. The couple can only listen as Juan Tomás’s wife, Apolonia, wails in mourning for the loss of her relatives. When Apolonia returns to her house to change head shawls, Kino whispers to her, explaining that they are taking refuge. Kino instructs Apolonia to bring Juan Tomás to them and to keep their whereabouts a secret. She complies, and Juan Tomás arrives moments later, posting Apolonia at the door to keep watch while he talks with Kino.
Kino explains that he inadvertently killed a man after being attacked in the darkness. Juan Tomás blames this misfortune on the pearl and advises Kino to sell it without delay. Kino, however, is more focused on his losses, detailing the destruction of his canoe and his house. He implores Juan Tomás to hide them in his house for a night, until they can gather themselves and make a second attempt to flee. Juan Tomás hesitates to bring danger upon himself but ultimately agrees to shelter them and keep silent about their plans.