Gabriel and Claudia are far from each other: he is busy searching for his enemy Serventi, she is struggling with a new life to forget an impossible love. But fate forces them back together, and as before, they must solve the mystery of a man capable of healing every physical ailment. Gabriel investigates the mystery of the stigmata: a young nun with wounds that were said to have opened by the will of Christ. Claudia believes this to be a serious religious delusion, but Gabriel discovers an ancient mystical ritual behind the mystery.

Gabriel's miraculous return to life binds him even more to Claudia, but there are those in the Congregation who doubt him and there is great concern about his powers. Gabriel must also solve the mystery of the corporeal apparition of a boy in an irreversible coma. Gabriel and Isaiah find themselves facing the toughest battle of all: the one with the devil incarnate. A town has been subjugated by evil. Their only hope lies in the help of a famous exorcist, who will find himself settling accounts with an ancient enemy.

Gabriel investigates evil presences in an ancient villa, where unsated ghosts from the past return to influence the present, endangering Claudia and Gabriel's lives. A married couple have moved to a small town near Rome, purchasing a villa that appears to be haunted by evil spirits. Inside a juvenile prison, an orphan boy nearing the end of his sentence manifests psychokinetic powers that allow him to hurl both objects and people. This power manifests whenever the boy hears a female voice in his mind and experiences memories of sexual assault.

Gabriel must verify an apparition of the Virgin Mary in a suburban village. Gabriel must navigate the religious fanaticism of the faithful and the rigid dogmas of the ecclesiastical elite, questioning the meaning of faith. A girl, almost completely drained of blood but still alive, unleashes fear in a country village. Gabriel and Claudia must confront a legendary creature: a vampire. Gabriel, tormented by his powers, must decide whether to leave the Church.

Gabriel has left the priesthood to live with Claudia, when his patient and old friend, Francesca, manages to bring to life a demonic monster capable of emerging from a person's dreams and then killing them in reality. The nightmare also interacts with Claudia, who falls victim to it. A young woman hears her dead son's cries deep in the catacombs near her home, and the same sounds are heard first by a medium and then by the local parish priest. Everyone in her family believes she's a poor madwoman, but the girl refuses to give up and manages to contact Father Gabriel and Claudia.

Claudia is taken hostage by Bonifacio Serventi's organization, which uses the moment to initiate a malignant process within Claudia so that Gabriel, in addition to using his dark power against Serventi himself, can use it. For Gabriel, it is the final showdown: caught between Serventi, who wants him to be the chosen one and embrace his dark power, and the Warrior Order, who wants to eliminate him for his very power. Gabriel is alone and risks losing Claudia forever.