Summertime. It's hot enough to fry an egg on the sidewalk. Richard "Beast" Best and Matthew Jackson can't wait to dive into Emily Arrow's cool blue pool. But when they get there, Mrs. Arrow tells them that Emily has gone off to summer school. Summer school! How could they forget? That's exactly where they should be right now. Sitting in class, Beast still thinks summertime is the best time, and he and Matthew can always go swimming in the afternoon. But then Matthew gives Beast some bad news. It's up to Beast to think of a way to help Matthew fast—before the summer is ruined.