It's springtime in the Lake District, and everyone is in the best of moods. The daffodils are blooming, the butterflies are fluttering, and Miss Jemima Puddle-duck has laid an egg! To celebrate, she decides to throw a party for the neighborhood. But there's a new neighbor in town, Sammy Whiskers, and Peter thinks he's up to no good. When Miss Puddle-duck's egg goes missing, will Peter be able to prove Sammy Whiskers is the one who took it? Or will all the neighbors turn against Peter?