A toddler alternates between terror and fury when her parents leave her in the care of her Grandmother for the day. To Caroline, “Grandmother” is “Not-Mamma. She screams at the woman’s every attempt to make her happy and imagines the worst about the kindly woman: Terrifying teeth that could eat her! Hair like wild worms! A lunch of red snakes! But as the day goes on, Caroline’s fears fail to materialize and she finds it harder and harder to remain grumpy.