At a secluded exclusive summer camp in the Mexican countryside, under the watchful eyes of their adult guardians, boys from a prestigious private school receive physical, moral and religious training to turn them into tomorrow's elite. The discovery of a hole in the fence sets in motion a chain of disturbing events as the boys devolve into a Lord of the Flies-like mob mentality that creates and spreads hysteria in this profoundly disturbing coming-of-age drama that unravels like a horror movie while drawing on actual events.