Following the sudden, violent and tragic end of a corruption investigation three years earlier, a group of prosecutors and police detectives, unafraid of dealing out haphazard violence and applying torture, bands with an ex-mobster and an assassin. They are determined to cross the line to take revenge, battle organized crime, and end institutional corruption in their city.
An experienced prosecutor on a crusade, having had a colleague killed and another one crippled three years earlier. After a change in higher-up politics, he is now allowed, and willing to fight dirty to capture his targets.
A widely feared, former violent mobster. After having survived an assassination attempt, he turned to an honorable life as restaurant owner at Turtle Market where his iron fist now marks the law.
A detective, a psychopath, a gambler, or a drug addict, nobody can tell for sure. Broken and dirty as he is, he is determined, without compromise, and fights to the last breath.
A rookie prosecutor who lost his partner to a seemingly random knife attack three years earlier. Still in grief, he is summoned to join a law enforcement team which is sometimes hard to tell apart from thugs.
A young man, a killer who lived his entire life as underdog, making every sacrifice to support and protect his younger sister. After an assassination attempt on his sister (meanwhile the mayor's secretary), Gang-joo joins the investigator team, both for revenge and atonement.
Uhm Tae-goo was originally cast in the role of Han Gang-joo but due to a knee injury, he was replaced by Ji Soo.[7]
Kang Ha-neul was originally cast in the role of No Jin-pyeong, but due to scheduling conflicts with his military enlistment, he was replaced by Kim Mu-yeol.[8]
The blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
This drama aired on a cable channel/pay TV which normally has a relatively smaller audience compared to free-to-air TV/public broadcasters (KBS, SBS, MBC and EBS).