You are a highly experienced deep-sea explorer.  But your search for the lost continent of Atlantis is the trip of a lifetime.  It will be the most challenging and dangerous mission of your career.  Many unknowns will test your courage, abilities, strengths, and judgment.  And you will be using newly designed equipment that's never been tested. 

A giant attack squid, killer sharks, even an underwater earthquake keep you on your fins.  Meanwhile you must make the choices necessary to go deeper, hoping one will lead you to your quarry: the mythical lost continent Atlantis!