The quiet town of Pedraza is shaken by the birth of a mysterious child. Local vet Elena and Mayor Paco investigate the incident and begin to uncover the troubling past of their newly appointed priest, Father Vergara (Eduard Fernández) – and the significance of a curious coin he has in his possession.

Father Vergara flees from his past taking refuge from the very devil, who pursues him to recover a treasure, one of the 30 coins for which Judas betrayed Christ. It's time to face him again, and this time he's ready.

Elena and Paco discover that a local mirror is haunted. When Father Vergara spends the night investigating the mirror’s trickery, he risks getting swept into its deathly portal.

When the sinister new priest prepares a great ritual, a magical fog descends over the village. Vergara and Elena, return with the coin while Paco attempts to resist the conspiracy. The epic confrontation of good versus evil has finally arrived.