Toledo, Spain, 1997. The residents of Río Blanco have accepted the settlement of Moroccan seasonal workers in Fuensanta. Coexistence brings tensions, known by Sonia, an NGO leader; Father Ángel, the local priest; and Safir, the imam. What they don't imagine is that Fuensanta's foundations hide something capable of unleashing their worst nightmares, regardless of their beliefs or prayers.