What starts as a boring family vacation becomes an out-of-this-world adventure when 13-year-old Glen Johns is accidentally blasted to the moon. On the lunar surface, he'll search for a missing astronaut, find the source of a mysterious transmission, and uncover a secret as old as the stars.
—Poptropica Creator's Blog
An astronaut has gone missing after sending a cryptic message about the discovery of an alien transmission. Back on Earth, an unsuspecting boy named Glen Johns finds himself trapped on a rocket that's about to blast off toward a remote moon base. Trapped on the moon, Glen must find the secret of the missing astronaut and the truth behind the alien transmission.