Hidden Identity

A member of the investigative squad is found in a criminal gang; Moo-won, the leader of the investigative squad, brings Gun-woo to the team and starts a new mission to infiltrate Jung's syndicate.

A member of the investigative squad is found in a criminal gang; Moo-won, the leader of the investigative squad, brings Gun-woo to the team and starts a new mission to infiltrate Jung's syndicate.

Gun-woo and Tae-in finally face each other; the investigative squad and Gun-woo implement a secret plan to chase Jung.

With the new member, Gun-woo, the investigative team investigates a murder incident; they fall into an unexpected trap and face the moment of choice.

The investigative team implements a new infiltration plan to find the Ghost; a dead boy is found and Min-ju is in danger of losing her life.

The conflict between Dae-hyun and Moo-won gets deeper; Dae-hyun makes a tempting offer to Tae-in and he now faces the moment of choice; Moo-won is threatened by an unknown group.