In a isolated village in Alentejo, a conflict is experienced. José Vitorino, one of the biggest landowners in the region rich in prehistoric monuments, plans to build a luxurious manor on a site of ancient stones, a place of devotion and practice of sacred rites. Indifferent to the protests of the people, who believe in the magical powers of the "holy stones" and attribute to their destruction the prolonged drought that has been felt in the region, Jose Vitorino hires an architect to make the project for the new house. On Christmas Eve, in the midst of winter solstice, a strange ceremony around a tapir, an altar of bloody sacrifices in the earliest times of prehistory, unleashes a nefarious spell. A struggle "against time" is initiated to nullify the effects of the defective ritual.