Yeo Jin suspects a new killer is involved in the latest murder incident. Meanwhile, Shi Mok collapses after leaving the autopsy.

Yeo Jin collects evidence as Shi Mok interrogates the suspect. Many questions get answered, but the most important problem of all remains to be solved.

Shi Mok sets out to meet the one he believes is the real murderer. He gets his hands on a bag that will determine the futures of many people.