Camazotz and his band of vampires have left Paris, but they're one step ahead of Jack and his friends. The vampire god has managed to secure nearly all the pieces of a powerful amulet that will give him power beyond imagining. There's only one piece missing, and it's in Mexico - the seat of Camazotz's power.Now Jack, Ben, and Emily must follow the vampire god to the Yucatan peninsula. Their only hope is to find the missing piece before he does. But the jungle is a dangerous place. And fighting Camazotz on his home turf will prove to be their greatest challenge yet....