In this sequel to The Atlantis Crystal, Digger and Jeannie flee from unknown assailants while they try to solve a seven-thousand year old mystery: is the perfectly preserved body in the crystal pyramid really a princess from Ancient Atlantis? And, how does her body survive as if she were only sleeping? Digger knows his boss is trying to have him killed, since he is the last member of the smuggling group. He doesn't know who the others are shooting at him from streets and jungles in Mexico. He is no safer while he spends time on the Gulf Coast trying to find a kidnaped girl. While some try to kill him, others try to keep him alive to gain possession of the golden urn he discovered at the smuggler's ancient dig site. Some believe it exists, while others think it's a hoax. The police are after him because they think he killed the other group members. Digger and Jeannie try to save the sleeping princess they know as Therena while they struggle to avoid their pursuers. In their flight, they don't know who is trying to kill them and who is trying to help them.