Nine teenagers and their guardians are hiding on Earth - protected by a charm that means they can only be killed in numeric order, three are already dead. John Smith is Number Four. And his mortal enemies are hunting him down.
The Sanctuary of the Redeemers is a desolate place - a place where hope & joy aren't welcome. Most of its occupants have been brought here as young boys, against any will they might have had. One boy watches the latest arrivals. He doesn't remember anything of his former life or know anything of his future. Meet the Angel of Death.