Grace is SO EXCITED to fly a freighter from her home space station (and away from her BORING mother Evelyn) to a faraway moon Plus, she'll get some quality time with her FUN mom Kendra--something Grace definitely needs. Finally, a real adventure that Grace can get excited about while the rest of her space station friends go away for their summer vacations.

But when Kendra is too focused on work, Grace's first big trip suddenly becomes kind of lonely. Grace had so many plans for fun. But all it takes is one quick decision to explore the moon by herself before Grace's adventure suddenly becomes not so out of this world at all. With her mom mad at her, Grace wants nothing more than to return home. Then their ship breaks down. Will Grace be able to get through to her mom and save their trip in the end?