Archaeologist Charles "Tex" Ravencroft's search for the clues that will unlock the mystery of Atlantis has taken him halfway around the world. Everywhere he goes, though, shadowy figures are intent on stopping him at any cost. The sudden appearance of a specter from his past just complicates things, and caught between two dangerous women he can no longer tell friend from foe. Time is running out for him and for the city he would seek to save.