Man Sang is still on the run and is now wanted. Meanwhile, Seo Hyun is having a birthday party and has invited Cheol. During the party, however, Seo Hyun gets kidnapped by someone. Now the police are doing everything to locate and rescue Seo Hyun.
Through Beom’s autopsy, he finds out there is only one murder instead of four. Moreover, from the body of the murdered victim, the NFS finds out the blood belongs to someone dead. Naturally, this discovery confuses the prosecution and the NFS.
Ji Han finds Hee Joo's tablet and starts investigating further. He, however, gets criticized for not being present at the crime scene with the newly discovered body parts. Meanwhile, the autopsy for the two victims take too long, and the result is inconclusive.
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.