After watching a video of himself disclosing his mission, Han Ji Hyuk seeks to find the rat in the agency and the last piece of the puzzle. As he narrows down his suspects, Jang Gwang Cheol, the second-in-command of the Huayang Gang, gets taken into custody. With his arrest, the police get a threatening call for his release or suffer the consequences. 

Ji Hyuk tries to find out who at the agency received the last emergency call from Dandong. To find out, he attempts to retrieve intel from the main server of the NIS.