Book IV of The Power of Five. Finally, Matt Freeman has found the fifth Gatekeeper: The last of the Five who must stand together against the dark powers of the Old Ones.  But the forces of evil are one step ahead, luring Scarlett to Hong Kong and trapping her in a dying city where the air is poisonous and from which there is no escape. The Old Ones have been tricked and defeated before. But this time they have a plan.  This time they are in complete control.