When the FGTeeV family goes on a trip to the National Space Center, the kids can't wait to see the inside of a next-generation space rocket. But when Shawn accidentally pushes a button he shouldn't have pushed, the family soon finds themselves blasted off into space. To survive in the outer reaches of the universe, they're going to use their smarts, wits, and skills to defeat angry space plants, escape interstellar circuses, and make their way home.

But when the family learns that their accidental trip might not have been an accident at all, will they be able to save themselves and the universe before it's too late?