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