Detective Hyung Min is asked to lead a special unit to catch a notorious crime organization ruled by the kingpin, Scale.

Complications arise as Shi Hyun takes over Scale's organization.

Trouble ensues when Kim Eun Soo goes undercover.

Ji Hyung Min convinces Yoon Soo Min to go undercover in order to get to Doctor's Son.

Team Leader Ji finds out there is a spy in the police.

Severely injured after being it by a car, Team Leader Ji continues his search for Doctor's Son alone