Rumours quickly spread about Shi Mok's violent nature. Regardless, he persists in his investigation. He finds his mentee, Young Eun Su, suspicious.

Shi Mok, puzzled by the details of the most recent murder case, visits the victim's home to seek more clues. Yeo Jin joins him in the investigation.

New pieces of evidence only increase the list of possible suspects. In the midst of the confusion, a few begin to question Shi Mok's innocence.