To Jack and Annie, this is a special journey. This time, they're not going back to the past but travelling to the future. It is 2013 and the magic tree house has landed on a moon base. Yes, people stay on the moon then, especially scientists.

Jack and Annie want to be astronauts so they decide to walk around the moon. But they are just kids and have not received any training on surviving in space. Will they complete their journey and come back to the present safely?