The captain of the RUM pirate ship is a cruel tyrant. He shows no mercy to innocent people encountered at sea, and even in a dispute with his woman, he angrily threw her into the ocean in a fit of rage. However, he fears the sea because he cannot swim. 　　The NELL pirate ship, despite having only two members including the captain and the crew, still dares to roam the seas recklessly. The two dream of making a fortune without a scratch. Their chance arrives when they spot a treasure chest on the RUM pirate ship and bravely charge toward it. However, upon getting close, their legs turn to jelly with fear. Fortunately, by the grace of God, the entire crew of the RUM pirate ship is fast asleep, allowing them to easily steal a chest of treasure right from under the captain’s nose. But can treasure be obtained so easily? After they rescue the RUM captain’s woman and bring her ashore, who knows what will happen next.