Seiya is compelled to accept an invitation to an amusement park from the mysterious and beautiful Isuzu. Unaware of the destination, he finds himself at the dilapidated Amagi Brilliant Park, widely regarded as Japan's most disappointing theme park. There, he meets Latifa, the park's leader and "real princess," who abruptly tasks him with rescuing the facility from imminent closure. It is then revealed that Amagi Brilliant Park is no ordinary amusement park, but one inhabited by fairies.