Jang Choon-dong is a traffic officer who aspires to become a homicide detective. He is assigned to go undercover to infiltrate a gangster network. Meanwhile, Lee Joong-dae, a member of Kwang-seob's gang, goes undercover himself by joining the police force. Joong-dae tries hard to gain favor with his squad leader in an effort to expose Choon-dong's identity.
as Jang Choon-dong
as Lee Joong-dae
as Moon Dong-sik, aka Dae Ga-ri
as Cha Se-rin
as Ahn Kwang Seop
as Squad Leader Park Jong-ki
as Park Jong-ki's wife
as Ssang-kal
as Jo Min-ju
as Disguised Female Detective
as Worker 1
as Executive Police 2
as Commando #1
