Norfolk, VA -- The Baltimore Clipper, the Reckoning, leaves port on a 10-day run to Cadiz, Spain, carrying the U.S. Secretary of War on a diplomatic mission. But a sudden squall send them off course into an area where the winds seldom blow and sailing ships become trapped: the Sargasso Sea. The crew soon discovers that the hold is full of illegal weapons, their purpose shrouded in mystery. And that something huge, ancient, and sinister lurks beneath...