A self-serving mythical creature's bid for invincibility backfires when he finds himself at the mercy of a woman who can see otherworldly beings.

Lee Seung-gias Son O-gong
Cha Seung-wonas Devil King Woo / Woo Hwi
Oh Yeon-seoas Jin Seon-mi / Samjang
Lee Hong-gias Jeo Pal-kye / PK
Jang Kwangas Sa O-jeong / Yun Dae-shik
ELas Ms. Ma Ji-young
Lee Se-youngas Jung Se-ra / Richie / Zombie / Asanyeo
Kim Seung-ohas Lee Han-ju
Sung Hyukas General Winter / Summer Fairy
Yoon Bo-raas Alice / Jade Dragon
Hong Jeong-eun
Hong Mi-ran