Haruka Haruno and her friends eagerly attend the spring carnival in Harmonia, a vibrant country renowned for its festive spirit and passion for music and dance. They intend to seek guidance from their senior Pretty Cure warriors but are thrown into disarray when the fairies go missing. Chaos ensues at the festival, compounded by the enigmatic and suspicious figures of Odoren and Utaen, and the restless guardian dragon of Harmonia. To restore tranquility, all forty Pretty Cure warriors band together to fashion a miracle of prodigious magnitude. Fueled by optimism and a plethora of rhythms, they unleash their potential to surmount every challenge and rescue the fairies and the carnival.