Fifteen-year-old Pearl is squatting in an abandoned boathouse with her father, a disgraced college professor, and two other grown men, deep in the swamps of the American South. All four live on the fringe, scavenging what they can--catfish, lumber, scraps for their ailing dog. Despite the isolation, Pearl feels at home with her makeshift family: the three men care for Pearl and teach her what they know of the world.
Mason Boyd, aka "Main Boy," is from a nearby affluent neighborhood where he and his raucous friends ride around in tricked-out golf carts, shoot their fathers' shotguns, and aspire to make Internet pranking videos. While Pearl is out scavenging in the woods, she meets Main Boy, who eventually reveals that his father has purchased the property on which Pearl and the others are squatting. With all the power in Main Boy's hands, a very unbalanced relationship forms between the two kids, culminating in a devastating scene of violence and humiliation.