Agents of the Korean National Intelligence Service (KNIS), Pyung-ho at Int’l Dept. and Jung-do at Domestic Dept. are both independently hunting a North Korean mole within the agency. During this investigation, they come face to face with an unbearable truth and must deal with an unthinkable plot to assassinate the South Korean president.
The ‘Beast Cop’ Ma Seok-do heads to a foreign country to extradite a suspect, but soon after his arrival, he discovers additional murder cases and hears about a vicious killer who has been committing crimes against tourists for several years.