An orphaned kitten, rescued from the jaws of a vicious dog by a young naval captain, Horatio Nelson, is taken on board the battleship HMS Agamemnon to control mice and rats in the hold. The year is 1793 and Britain’s navy is about to go to war with France. Terrified of cannons, mice and rats the kitten has to learn about life at sea, but struggles to overcome his fears.
Follow the cat’s adventures as he is befriended by a cabin boy and is helped by a manger full of animals to adapt to the life of a ship’s cat. Against regulations he smuggles a young monkey onto the ship and with his help starts to rid the hold of mice.
Finally, despite being injured, he is charged with the task of ridding the ship of two fearsome giant rats. How can he get the monsters off the ship and keep his place amongst the friends he has made on board. Failure is not an option.