When twelve year-old Katherine Flannigan turns to EBay to find a killer gift for the most popular girl in school she gets way more than she bargained for. Desperate to impress, Katherine ends up buying a magical, limbo-loving bottle of bubbles named Monica. Monica arrives to help Katherine overcome her shyness, learn how to stand up to bullies, and what it takes to be a real friend. With a little magic and a lot of heart Monica convinces Katherine to follow her unconventional suggestions. After all Katherine concludes, "Once you've decided to take advice from a talking bubble you really have to go with it."