: This episode advances the seasonal arc of the "Brujeria," a group of ancient warlocks planning to merge Hell and Earth. The Lamashtu is revealed to be just one of many "old sins" returning to the world.
The story picks up immediately where the previous episode left off. To survive a fatal attack by a (an ancient Babylonian demon) in the sewers of Mexico City, John Constantine is forced to make a desperate gamble: he invites the demon Pazuzu to possess his body. While the possession heals his mortal wounds and drives off the Lamashtu, it leaves John in a fight for his very soul.
As John is incarcerated in a Mexican prison—where he begins a violent, demon-fueled rampage—his allies and Zed Martin must find a way to exorcise Pazuzu before the demon takes permanent control. They are forced to collaborate with Anne-Marie Flynn , John’s former flame and a nun who has struggled with the guilt of the "Newcastle incident." Key Themes and Character Development