Olga is a genetically altered "shepherd" born to live at sea herding factory tuna.  She lives with her two shipmates aboard a submersible raft in the middle of the Pacific Ocean.  Toivo is an independent fisherman who, along with two dolphins, struggles to make a living catching what few wild tuna are left.  The two of them should never have met.  But, someone is killing shepherds and fate pushes Olga and Toivo to join forces just to stay alive.  Together they must outwit heavily armed drug smugglers bent on killing anyone who gets in their way.   The nonstop action hurtles toward a startling conclusion that will keep you on the edge of your seat.