Philadelphia detective John Hobbes Denzel Washington visits convicted serial killer Edgar Reese Elias Koteas on death row just before his execution. Reese arrives with an unsettling calm, grips Hobbes’ hand in a way that feels oddly intimate, and mutters what sounds like gibberish in an ancient tongue later identified as Syrian Aramaic. As the syringe finally empties, Reese taunts the witnesses and sings the Rolling Stones tune “Time Is on My Side,” a moment that will echo through the cases that follow.
What begins as a routine inquiry soon spirals into a brutal pattern: a string of murders that mirror Reese’s known offenses. Hobbes and his partner Jonesy John Goodman initially chalk it up to a copycat, chasing leads and trying to read a language that isn’t easily decoded. Their investigation leads them to Gretta Milano Embeth Davidtz, a woman whose late father, a respected detective, ended his life after being accused of occult-related killings similar to Reese’s. At the abandoned Milano family cabin, Hobbes uncovers a trove of occult texts and, beneath layers of paint in the basement, the name “Azazel” hidden away. The discovery raises the stakes and deepens the mystery.
Gretta warns Hobbes to walk away, but she soon reveals more: Azazel is a fallen angel who can possess humans through touch. The demon cannot possess Hobbes directly, she explains, but it can inhabit others and torment him by invading the lives of people around him. Hobbes quickly notices a chilling pattern—people he knows begin singing the same tune Reese sang. The haunting refrain becomes a taunt as Azazel hops from host to host, moving through the ranks of civilians and even members of law enforcement.
The danger intensifies when Azazel possesses Hobbes’ own nephew Sam [Michael J. Pagan], and then attacks Hobbes’ brother Art [Gabriel Casseus], who has an intellectual disability. The demon engineers a confrontation that forces Hobbes into a heartbreaking choice: he must shoot a possessed schoolteacher in front of witnesses. Testimonies, swayed by Azazel’s influence, threaten to ruin Hobbes’ career and life. Azazel then murders Art and marks Sam, prompting Hobbes to shelter his nephew with Gretta. She explains a crucial rule: if the demon is expelled from a host, it can only survive for the length of a single breath before dying.
Determined to end the menace, Hobbes lures Azazel back to the Milano cabin. Jonesy and Lieutenant Stanton Donald Sutherland arrive to seal the trap, but Jonesy—now under Azazel’s control—kills Stanton in a brutal contradiction of loyalty and order. In a desperate gamble, Hobbes plans to shoot himself so that Azazel will inhabit him, reasoning that the demon will die if stranded without another host. Jonesy is mortally wounded in their confrontation, and Hobbes reveals a poisoned preparation—the same toxin Azazel once used—to ensure the demon cannot survive long in a human host. After a tense struggle, Azazel enters Hobbes, but the poison swiftly destroys the demon.
In the final moment, the voiceover reveals Azazel’s defiant taunt: he ridicules the audience for thinking he is truly defeated. A cat creeps from beneath the cabin and wanders away—a grim hint that the demon may have survived by transferring into another creature. The credits roll to the strains of “Sympathy for the Devil,” leaving a lingering sense that evil, once unleashed, can slip away into the shadows, waiting for another breath to return.
