Many years ago, Phil Lontana, an oceanographer, was searching for the lost underwater city of Merinth. Years after, Phil went missing, and now, Melis Nemid, a marine researcher and Phil’s stepdaughter, is living alone on a remote island in the Carribbean, working on researching dolphin behavior. When Phil contacts Melis out of the blue, she flies to Athens to meet him, only to be greeted by the visuals of Phil’s ship blowing up with him on board.