Tracking another of Uncle Roger's more outrageous theories concerning a special crystal skull, Ian takes Mac back to Central America where together they search for a hidden temple near the huge archaeological site of El Pilar which straddles the border of Belize and Guatemala. After searching for weeks, Ian knows he is close. He has found the plaza and the causeway and now the palace, the temple has to be here! Whatever Ian hoped for it most certainly was not an attack by two determined thieves who will stop at nothing to get their way.