Ryu Tae Oh, a patient at the Iltan mental hospital shows admiration for another patient claiming to be Gap Dong. Tae Oh is released and finds a job as a barista. His psychiatrist Oh Maria also has a connection to the Gap Dong case. A murder occurs that mirrors the first murder by Gap Dong 20 years ago. Chul Gon focuses on Mu Yeom as a suspect. Mu Yeom follows a lead and is knocked out.