After the shopkeer suggests that Mr Benn try on a pirate’s outfit, our suburban hero arrives on the deck of a pirate ship commanded by Captain Tempest. When the lookout spies a sailing ship on the horizon, the captain orders his crew to plunder the vessel for its booty; however, the sailors seem strangely unwilling to carry out their orders, and the sailing ship gets away. Mr Benn soon learns that the crew don’t really want to be pirates, and they are willing to try anything to get out of attacking innocent vessels…