Baek Beom has worked as a forensic doctor for 10 years. He has a bad personality, but he is excellent with his work. Baek Beom does not open his mind to other people. Eun Sol is a rookie prosecutor with a warm heart. She has a bright personality and she comes from wealth family background. The forensic doctor and prosecutor work together to solve cases.

Dae Woong is born with a silver spoon in his mouth and dreams of becoming an action movie star. In pursuit of this dream, he visits a temple where he accidentally releases a nine-tailed fox trapped in a painting for 500 years. In the midst of this the nine-tailed fox accidently loses her orb. Her goal now is to reclaim it, and she also comes to know that if she carries the orb for 100 days, she will become a human. Can the nine-tailed fox become human?