This is one of Terry’s strangest adventures. A submarine has become stranded and Terry has been asked to save it. He must go to the bottom of the ocean to pull the submarine to safety.

The trip to the ocean floor is scary enough but Terry encounters a huge octopus who tries to eat him. This strange and frightening octopus talks like a pirate. But upon finding that Terry is not edible the octopus decides to become Terry’s friend. Unfortunately, the octopus has damaged Terry and broken the line needed to haul him back up to the surface. But Terry is still determined to save the submarine.

Together Terry and the pirate octopus find a way to pull the submarine to safety but Terry is still stuck on the ocean floor. He will remain there forever unless the clever octopus can find a way to save him. How will Terry get back to the ship on the surface?