Years in the future, all the people and animals on planet Earth need to relocate to "New Earth" due to pollution making the Earth uninhabitable. So all the different species of animal are packed into separate arks - Aardvarks on the Aardvarkstar, right down to Zebras on the Zebrastar - to make the journey. But somewhere along the way, the Dogstar went missing. A technical glitch, pilot error, who can say? Aboard the Dogstar is every canine family pet that ever was. Every lovable terrier, every pampered lapdog, every boisterous hound, every loyal companion. And Hobart. The Clark family loves Hobart. He's a trusted, loyal buddy - a valued member of the family in every sense. The Clark kids aren't going to take the situation lying down. Even though everyone tells them it can't be done, they set out to find the Dogstar! But their journey is hindered by Bob Santino, an evil genius who produced the Robog, a robotic replacement dog that he's sold very successfully to those people on New Earth who are pining for the real thing. And that's everyone! Join the Clark kids on their intergalactic adventures through the dark corners of the galaxy on their noble quest to find man's best friend and defeat Santino!