Framed for murder by the demonic Legion, Father Vieri must survive a deadly chase through the streets of Rome in order to escape the Inquisition. But as he possesses Vieri's body, Legion unveils terrifying new ways to spread his corruption across the Vatican. Can Vieri find a way to turn the tables on the unholy adversary that wears his face? Or will this haunted exorcist find his last hopes extinguished by the Devil himself?