The kingdom of Märchenland, home to various fairy tale characters, is attacked by Pierrot, the evil emperor of the Bad End Kingdom. He seeks to steer the world toward its worst ending and steals the Cure Decors, which power Royale, the Queen of Märchenland. Using her last energy, Royale manages to seal Pierrot away. However, his minions attempt to revive him by harnessing Bad Energy from the people of Earth. To protect Märchenland and regain her strength, Royale sends five mystical lights to Earth and orders a fairy named Candy to find five legendary warriors, the Pretty Cures. Arriving in the town of Nanairogaoka, Candy encounters Miyuki Hoshizora, a new transfer student, who soon gains the power to become Cure Happy. Joined by her new friends—Akane Hino, Yayoi Kise, Nao Midorikawa, and Reika Aoki, who become Cure Sunny, Cure Peace, Cure March, and Cure Beauty, respectively—Miyuki and her friends form the Smile PreCure. They aim to recover the Cure Decors, save Märchenland, and protect everyone's happiness.