Jimgrim is an American secret agent who has been recruited by the British intelligence services because of his in-depth knowledge of Arab life. Together with his friends and compatriots Ramsden and Ross he encounters an old acquaintance, beautiful Joan Leich, who is experiencing certain unpleasance on her property in Egypt. The group travels to Egyptian desert, accompanied by an old mathematician from China, in order to locate the mysterious tomb of Khufu.