When several progressive Egyptian leaders are killed, the IMF team is sent to stop the head of the department for ancient studies at the Cairo museum. It turns out that he has revived the cult of Seth, with sacrificial ceremonies. His henchman has been impersonating a mummy to kill anyone who might talk. Jim, Shannon and Max pose as part of a dig, claiming they have found important relics from the original worship of Seth, while Nicholas and Grant try to break the trust between the leader and his followers. But Grant is caught and is scheduled to be the next sacrifice...