What happens when a well-funded marine environmental activist group acquires the most technologically advanced WWII era U-boat the Germans ever produced? Purchased from a corrupt Russian admiral during the collapse of the USSR, the former U-3531, acquired as a spoil of war stored for decades and forgotten, is fully-equipped, ready to get under way. Picture Green Peace on steroids as the dedicated crew of the Oceans First organization confronts multi-national corporate environmental criminals who pollute the oceans of the world with impunity. Powerful enemies are made along the way as the mixed gender Oceans First crew takes on oil companies, cruise ship lines dumping trash at sea, rogue Japanese whalers in Antarctic waters and sea turtle poachers in the Galapagos Islands. Finally, the aquatic creatures of the seven seas have a guardian avenger to protect them from the carnage inflicted by corporate greed.