Tabitha Turnpike is a little girl with a big imagination. But when her imagination gets her in trouble with her mom and dad, they insist that she quit being creative and grow up. Only problem is, Tabitha discovers a monster living under her bed and she can’t tell her mom and dad about it, because they will think she’s using her imagination again. Her monster has problems of his own. So the two team up and travel to Underthebedland to use their creativity and prove that all of us, monsters and humans, are great despite of our differences.