Vampire Prosecutor Mandarin version tells the story of Min Tae-yeon (played by Yeon Jung-hoon), a prosecutor of the Seoul Local Special Crime Investigation Team. Although he looks like an ordinary person, he actually has a secret that he cannot tell. He is a vampire. He craves the blood of the living more than the blood of the dead, but he has been suppressing himself for a normal life and social principles. Min Tae-yeon (played by Yeon Jung-hoon) has been chasing the murderer who killed his sister for a long time. He will never let go of any clues. He and Lee Young-ah's character are a pair of happy enemies, and the two often quarrel. In the investigation of complex cases, he uses his superpowers to solve one mystery after another.