Bona, a rebellious soul who cannot exist without singing, harbors a secret dream: to become a singer. She keeps this aspiration hidden from her shaman grandmother, Geumhwa. However, Bona's life takes an unexpected turn when the ghost of an old singer named Gabyeol appears. Determined to achieve her dream, Bona plans to learn music from Gabyeol, hoping to become a successful singer and earn Geumhwa's approval. But as Gabyeol begins to reveal her demonic qualities, Bona is forced to reconsider her grandmother's wisdom.