When Leda wakes up by falling out of bed, she knows that gravity must be in a very bad mood. Sure enough, she struggles with stumbles and bumbles at home, on the bus, in the classroom, at recess and lunch. A lesson on gravity illuminates what's going on. And after a visit to a science center, Leda and gravity are both feeling better. Just in time for her to tumble-- happily!--into bed.