Of course, their old adversary Dr. Khalid is close behind as the kids press on in search of the lost city of stone gods. But he is not the worst of their problems. This time Adam will clash with a terrible enemy who adopts the persona of an evil Aztec god, Tezcatlipoca, and is keen to revive the ancient tradition of human sacrifice. Adam, Justin, and Tukum must play a dreadful ball game of life and death and maybe survive. Will they emerge alive from the jungle? Will Dr. Khalid find the third Stone of Power before they do?