When Willa's upside-down magic rains, it pours. Clouds form under ceilings. Classrooms get flooded. Nory and the kids in Ms. Starr's Upside-Down Magic class always have umbrellas nearby, just in case.

Willa hates being the source of such sogginess. And yet the more she rains, the worse she feels . . . and the worse she feels, the more she rains.

Nory, meanwhile, can't wait to celebrate her first Bing Day-her town's magical holiday. There's even a parade! Too bad she's stuck doing her Bing Day class project with drippy Willa. To make things worse, Elliott seems to be taking Willa's side on everything.

All the storminess is threatening to flood the UDM friendships. Will they drown in misery? Or can they use their magic to make the storm clouds disappear?