A BUSLOAD OF AMERICAN TOURISTS IS KIDNAPPED AND HELD FOR RANSOM IN GUATEMALAAs a sadistic killer holds a group of archaeology buffs hostage deep in the jungle, one of the tourists escapes. Paul Silver came on this trip to learn about the ancient ruins at Piedras Negras, a site that may hold secrets from twelve thousand years ago. For now his objectives are set aside. He has to plan a rescue. The captives - his friends - are so far from civilization...