"A young girl is thrilled to spend the day with her big sister, but things don't go as planned. It's so hot outside--legs-stick-to-the-seat hot--that her ice cream melts and then it rains. Their plans must change, and then change again as the library closes just before they arrive. But big sister knows just what to do next--even if it's nothing besides splashing in puddles and looking at the stars. The day isn't anything like little sister expected...