When an environmental radical begins to sink whaling ships, the UEO orders Bridger to find the attacker and destroy him.

However, Bridger refuses on moral grounds and resigns as captain of the seaQuest.

After faking his own death a second time, radical environmentalist, Max Scully, returns and is pardoned for his murderous crimes.

Captain Hudson is ordered to escort him to an undersea ecological utopia, unaware of Scully's true intentions.