Thirteen-year-old twins Andrew and Kristine Taylor are continuing their journey with the crystal locket, which they first discovered in present-day Virginia. This time, they find themselves in ancient Crete, a highly advanced civilization, with indoor plumbing and awe-inspiring architecture, as well as the fabled city of Atlantis. In Crete, they face their dreaded nemesis Chimera, where things are not as they seem and the mysteries run deep. This time, their challenges are harder, their enemies more cunning, and their will even stronger, as they again battle the forces that could destroy their world...but is it enough to thwart their enemies in time?