On the bottom of the icy sea off Nantucket lies the battered remains of the Italian luxury liner, Andrea Doria. But few know that within its bowels rests a priceless pre-Columbian antiquity -- a treasure that now holds the key to a puzzle that is costing people their lives.

For Kurt Austin, the leader of a courageous National Underwater Marine Agency (NUMA) exploration team, the killing begins when he makes a daring rescue of a beautiful marine archaeologist. The target of a powerful Texas industrialist named Halcon, Nina Kirov was attacked off the coast of Morocco after her discovery of a carved stone head that may prove Christopher Columbus was not the first European to discover America. Soon Kurt and Nina embark on a deadly mission to uncover Halcon's masterful plan -- an insidious scheme that would have him carve out a new nation from the southwest United States and Mexico, and ride to power on a wave of death and destruction.