Kurt Austin and his crew slake their thirst for action as they attempt to drown an eco-extortionist's plan to control the world's water supply An investigation into the sudden deaths of rare whales leads Kurt Austin, National Underwater and Marine Agency crew leader, to the Mexican coast where someone tries to put him and his mini-sub permanently out of commission Meanwhile, in South America's lush hills, a murderous cadre of bio-pirates is intent on stealing medicinal secrets worth millions Soon Austin realises they're working the opposite ends of the same grand scheme