Clement C. Moore's beloved poem "'Twas the night before Christmas when all through the house not a creature was stirring, not even a mouse..." is brought to animated life through the inimitable illustrations of Mary Engelbreit in this holiday film inspired by her bestselling book. Not all is tranquil when viewers learn that, indeed, a mouse is stirring in the house and is actually quite agitated. Gregory, an earnest rodent, has just overheard the chilling news that Christmas might not come at all because of a spell cast on Santa by a naughty fairy named Implestik. And so, between stanzas 8 and 9 of Moore's familiar verse, Gregory launches off on his own adventure into the enchanted wood to find the Fairy Queen who can break Implestik's bitter spell. Along the way, this mouse-on-a-mission meets heartening heroes--an insightful older mouse named Augustus, a wise owl, and a sprightly young fairy--who guide Gregory's footsteps.