Kate has a problem. She's terrified of her aunt's big bulldog. Kate's aunt calls the dog Cookie. Kate calls it a monster! One day, after fleeing the apartment to escape Cookie, Kate takes the strangest elevator ride ever--complete with a mysterious package and floor after floor of real-life monsters! It takes all of her courage, but Kate soon finds that the monsters aren't so scary after all. Kate makes some new friends, and she discovers the perfect way to tame her own personal beast.