A man walks confidently through the night time streets of London. He is one of the Brethren, a shadow society of occultists. His life is only hours from ending. His flesh is about to be taken as host for a daemonic entity that has clawed its way out of hell's pit. Now things are afoot. Strange things. The lions of Traflagar have fulfilled their prophecy, climbing down from the plinths around Lord Nelson's column to defend the city. The daemon stalks his tender prey through the gaslit streets, meat markets, fish stalls and slaughter houses of Whitechapel. He has a taste for women, though not ordinary women. These women are different. Special. They may look like whores but they have the blood of angels flowing in their veins. If he can kill enough of them, bathing in their innocent blood, then the daemon can open the ancient Ald Gate-one of the seven great gates of London-the last gate to Eden, and go home, even if it means tearing London herself apart. The gates are guarded by The Seven, bloodsucking angelkind put there to guard a very special prisoner. A prisoner who cannot be allowed to escape. Satanial. The Devil by another name. Cast down and trapped in a hell on earth, watched over by Uriel, the mad Archangel. Can the men of Greyfriars stop all hell breaking loose?