 The story then shifts to an envoy of the US President having a secret meeting with a would-be Aztec dictator Topiltzin.He kills the envoy, and sends his skin and heart back to the President.The plot then shifts to a Middle Eastern terrorist secretly hijacking a plane carrying Hala Kamil, the new United Nations Secretary-General, the hijacker bails out of the plane after ensuring that the plane crash lands in Greenland, where Dirk Pitt, Al Giordino, and Rudi Gunn are trying to locate a sunken Soviet submarine.