December 21, 2012:  The fabled Feathered Serpent begins his relentless ascent out of the bowels of the earth, escaping thousands of years of torturous confinement. Controversial astrobiologist and archaeologist Caden Montez-who believes Teotihuacan is the best site on earth to find alien life forms, such as the Serpent-is on his trail.  While exploring this so-called "City of the Gods"-a place so eerie it terrified even the most ferocious Aztecs-she discovers that  the Serpent has broken free.Ancient Mayan priests prophesied that when the God-King returned, he would open the gates to the End Time. Together with an ancient 1000-year-old Mayan warrior-who has crossed the Gulf of Time to save humanity from extinction-the outrageous and beautiful Caden must stop him.  Scientists, political leaders, and journalists who have long ridiculed Caden's theories have no one else to turn to.  The Mayans' Fourth Horseman of the Apocalypse is on the move, and humanity's survival hangs in the balance.