A Betrayed Archaeologist. A Ghost from the Past. A Dozen Worthy Sacrifices. Expedition leader Hiram Kane is holed up in his native England recovering from wounds both physical and mental, when his family receives a mysterious anonymous letter that dredges up nightmares from the past. Could it also offer a ray of unexpected hope? Across the globe beneath a forgotten Aztec pyramid, a disillusioned archaeology professor is about to unleash his wrath...