In the shadowy corners of the Vatican, a mysterious phenomenon unfolds as a young boy, Luca, becomes increasingly possessed by an otherworldly force. Father Gabriele Amorth, the renowned Chief Exorcist of the Holy See, is summoned to perform a ritual exorcism and rid Luca's troubled soul of this dark influence. As Amorth delves deeper into the case, he discovers that Luca's possession is merely a symptom of a far more sinister conspiracy. The Vatican, shrouded in secrecy and tradition, has been hiding a centuries-old darkness that threatens to destroy the very fabric of the Church. A cabal of powerful cardinals and clergy, driven by ambition and greed, have long manipulated the institution from behind the scenes. As Amorth investigates further, he uncovers a tangled web of deceit, corruption, and supernatural evil. He must confront his own doubts and fears as well as the darkness that lurks within the Vatican's corridors of power. The stakes are higher than ever before: the very soul of the Church hangs in the balance. With each step forward, Amorth inches closer to a shocking truth. Luca's possession is merely a pawn in a much larger game of good vs. evil. The true extent of the conspiracy's scope and malevolent intent will stop at nothing to claim the Church as its own. Can Father Gabriele Amorth, with his unyielding faith and determination, uncover the truth and save the Vatican from this sinister plot? Or will he succumb to the darkness that has haunted the institution for so long?