Paul Watson is captain and founder of Sea Shepherd, a radical environmental group made up of self-proclaimed eco-pirates who fight for marine conservation. Their mission is to confront and stop Japanese fishing vessels from killing whales in Antarctica.
Sea Shepherds finally spot a Japanese whaling ship, the harpoon vessel Yushin Maru #2. Captain Paul Watson devises a dangerous plan for two of his crewmembers to board the Yushin fleet and deliver and letter telling them to stop the killing of whales.
With Ben and Giles of Sea Shepherd being held hostage aboard the Japanese whaling ship Yushin Maru #2, Captain Paul Watson is pleased at the international media storm he has created, and rejects an offer from whalers to release the hostages.
After three long days, Pottsy and Giles are transferred back from the Yushin Maru and become instant celebrities with the media. Just as they are settling back in, the crew is concerned when they discover an unknown ship has been following them!
The ship's engineer reports that one of two engines is broken. Now they will be unable to keep up with the Japanese whalers and are forced to return to Melbourne for repairs. While heading back, they have to navigate through a massive oceanic storm.
Armed with new volunteers, the Sea Shepherds head out to sea to find the Japanese whaling ships. After they pinpoint the fleet's location, the Captain raises the stakes and plans for another boarding. This time it will be an all-female boarding team!
The Sea Shepherds have finally found the most important ship in the Japanese whaling fleet, the Nisshin Maru factory ship. Everything has led to this moment and despite warnings from the Japanese whalers, the Sea Shepherds strike.