Isadora Moon Goes on a School Trip

Isadora's class are going on a school trip to an old castle. The castle's a little bit spooky and it doesn't help that there's thunder and lightening outside. While Isadora investigates the castle dungeon she discovers a surprising new friend. He's a little different, like her, so Isadora's going to have to try and find a way of introducing him to her friends without them getting too much of a shock.