Rescuing an oil survey team from a freak wave on Russia's Lake Baikal is all in a day's work for adventurers Dirk Pitt and partner Al Giordino. Yet when their ship is sabotaged and the survey team vanishes, Pitt is forced to get to the bottom of a mystery with far-reaching consequences. Soon he's on his way to Mongolia. There, a powerful and ruthless business tycoon holding an astonishing secret about Genghis Khan is hoping to emulate the legend's greatest conquests - but on a global scale!

With the legacy of Khan and the lost treasures of Xanadu as the prize, and the future security of the world at stake, Dirk Pitt for one isn't going to stand idly by...