A group of young employees from the Autonomous University of Puebla decide to take a weekend trip to the nearby town of San Miguel Canoa to explore its natural beauty and climb the volcano La Malinche. Unfamiliar with the local customs and unaware of the prevalent political tensions, they find themselves navigating an atmosphere thick with suspicion and hostility. The town is under the tight grip of a fiercely conservative and paranoid priest who sees any outsider as a potential threat to his control. Through conversations and brief encounters, the visitors quickly realize they are not welcome and that the villagers are on edge, influenced by the priest's incendiary rhetoric.

As night falls, the situation rapidly escalates. The travelers seek refuge in the town, but instead of finding shelter, they become targets of a widespread hysteria that sees them as dangerous insurgents. An atmosphere of fear blankets the village, fanned by rumors and misinformation. Tensions between the locals and the visitors reach a boiling point, leading to an inevitable confrontation. This dramatic and harrowing string of events exposes deep-seated fears and prejudices that unravel the fragile social fabric of the town. The chilling outcome serves as a stark reminder of how easily mistrust can turn into violence under repressive and paranoid leadership.