Just before sunrise sometime around 1900, a Mexican-Indian pearl diver named Kino awakens to the sound of crowing roosters. He lives near the village of La Paz, on the Pacific coast of the Baja Peninsula. He watches the day dawning through the crack of the door to his house, which is made of brush--bundles of straw fastened together to form walls and a roof. He then looks to a makeshift cradle, a kind of box hanging from the roof of the hut, where his infant son, Coyotito, sleeps. Finally, still resting on the mat, Kino turns his gaze to the open eyes of his wife, Juana. She looks back at Kino as she always does in the early morning. Hearing the waves rolling up on the nearby beach, Kino closes his eyes again to listen to the sound of an old song in his headuana rises to check on Coyotito and starts a fire. Kino also rises, wrapping himself in a blanket and sliding into his sandals. Outside, he regards the climbing sun and the hovering clouds as Juana prepares breakfast. In the company of a goat and a dog, Kino stares "with the detachment of God" at a group of industrious ants underfoot. Behind him, Kino hears Juana singing and nursing Coyotito. Her song is simple, and it moves Kino to contemplation.
As the rest of the neighborhood stirs, Kino goes back inside the house and finds Juana fixing her hair. As they eat their simple breakfast, there is no speech between them beyond a contented sigh from Kino. A ray of light shines on Coyotito's hanging box, revealing a scorpion crawling down the rope toward the child. Terrified, Juana recites a charm and a prayer to protect Coyotito, while Kino moves forward to capture the scorpion.
Coyotito spots the scorpion on the rope, laughs, and reaches up to grab it. Just then, positioned in front of the hanging box, Kino freezes, slowly stretching out his hand toward the scorpion. When Coyotito shakes the rope of the hanging box, the scorpion falls, lands on his shoulder, and stings him. Kino immediately seizes the creature and crushes it in his grasp, beating it to death on the floor for good measure. Kino's retribution does no good, though, and Coyotito screams with pain.