Peter Pan no Bouken follows Wendy and her two younger brothers as they are whisked away to Neverland by the eternally youthful Peter Pan. In this adventurous realm, they encounter fairies, mermaids, Native Americans, and pirates. As the de facto caretaker, Wendy struggles to find any respite amid the thrilling escapades, including breathtaking pirate battles. Later, the group embarks on a quest for buried treasure, guided by a map they acquire from the pirates.