Peppa Pig and her brother, George, are out for a nature walk with Mummy Pig and Daddy Pig on a beautiful fall day. There are so many things to be thankful for-- the blue sky above, the trees full of apples, the pumpkins, the fallen leaves that are so fun to play in. When a rainstorm catches them by surprise, will it ruin their perfect autumn day? Or will it leave behind a surprise that Peppa might be thankful for after all?