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 – and the significance of a curious coin he has in his possession.

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.