Dark Side of the Moon

How about going to the moon? Marcus and Samantha Willoughby figure it'll be a quick trip...kick a little moon dust, leave a discreet footprint or two, then return home before they're missed. After all, it's not like there's anything or anybody to encounter on Earth's satellite. Is there? Follow the twins as they uncover a well-kept secret. One which could cause a crisis of unimaginable proportions. Can they help provide a quick and effective solution? Because failure simply isn't an option.