In 1949, a young exorcist named Carlos is sent on a mission to Syria by the Vatican. He is given the responsibility of safeguarding a powerful artifact. Later, in Argentina, he meets a nun, and together, they inadvertently bring forth an unimaginable evil, but a divine condition keeps it imprisoned. Eighty years later, a group of filmmakers stumbles upon an old mansion, unknowingly stepping into a prophecy on the brink of fulfillment. Among them is a crew member with a secret mission: to defeat the ancient evil that lies within.