In this fifth entry in the Environmental Space Explorers series, we travel with Josh, Deanna, and Greg to a mysterious orange planet whose inhabitants have asked for help. But the kids' mentor, Professor Jameson, has detected angry voices in his communication with the planet. The young astronauts get approval to make the journey with a warning to return to Earth if they run into trouble. The children, who dub the planet Orange Owl Planet, must help their new friends with not only environmental concerns, but also the universal problem of bullying. Can the Earth kids help solve the new planet's environmental issues? Will Deanna be able to come to terms with her own experiences with bullying and help a new young friend cope with her own bully?