Peppa invites all of her friends round to her house for an under-the-sea fancy dress party, with a swimming disco, starfish-shaped sandwiches and a real beach! The only problem is, Mummy and Daddy Pig aren't prepared for this at all! Luckily, Miss Rabbit, Emergency Party Planner and Entertainer Extraordinaire, comes to the rescue and makes all Peppa's under-the-sea dreams come true!