Private detective Yoon San gets turned into a vampire one day while he was out on a duty. As he meets various clients and cracks cases for them, he also uncovers the mystery surrounding him as well as the secrets from his past.

Lee Joon, Oh Jung-se, Lee Se-young, Kim Yoon-hye, Lee Chung-ah, Jo Bok-rae, Jei, Ahn Se-ha, Kim Ki-moo, Choi Gwi-hwa