Season 1 · 11 episodes
The series starts with the murder of a 10-year-old girl in 1984. 15 years later, after the case goes unsolved and passes the statute of limitations, a doctor named Goda Ryoji suddenly quits from his hospital and eventually becomes a detect…
Heo Young Dal is in deep debt, and finds that the only way to get out of his own messes is to be Jang Dong Soo's informant.
With a lot of stolen money in his hands, Young Dal and Jang Soo must now tread carefully so that they won't be found by Boss Ki Chan's enemies. Yang Ha finally gets Jung Hee to have a drink with him.
Young Dal gets in trouble with Ki Chan's enemies, and finds himself caught up against Watanabe. Dong Soo learns more about Go Bok Tae's gangster past that might be tied to his own.
Young Dal resolves to take over the town of Sabuk. Shin Hye's father makes a special request to Jang Soo that will forever taint his reputation.
Shin Hye heads to Sabuk to learn more about Dong Soo. Young Dal moves forward with his plans to take over Sabuk. Yang Ha's secret identity is slowly revealed to more people in the casino.
Young Dal and Dong Soo reaffirm their alliance even though Young Dal isn't sure if he's completely loyal to the detective yet. Yang Ha takes his place as a director in his father's company.
Dong Soo leaves the force, and begins his own investigation on his father's death. Young Dal sets his plans to take over Madam Jang's casino in motion.
As Young Dal, Dong Soo, and Yang Ha begin to align their loyalties they find themselves on opposing sides with those they believe are their allies.
Young Dal pulls off a successful feat that makes Yang Ha hate him even more, and makes Jung Hee fear for his life. Just as Dong Soo learns the truth of his mother, Go Bok Tae learns about how Dong Soo is connected to his dirty past.
Young Dal and his friends find themselves in jail, and Yang Ha makes a new dangerous ally that could ruin Dong Soo's revenge.