A lawyer who lost his family because of the corrupted power and dirty money makes a deal with an evil man with a desire to avenge of them.
Star lawyer Lee Tae-kyung and construction company chairman Song maintain a symbiotic relationship by accumulating vast wealth in exchange for resolving the high-ranking officials' dirty cases.
Tae-kyung, following Tae-joo's movements on the day of the unsolved murder case, becomes convinced that Yang Chul-gi is related to his brother's death.
Tae-kyung proposes a deal with Yang Chul-gi, offering evidence related to his brother's death in exchange. Yang begins to blackmail both Tae-kyung and Chairman Song, trying to extort more money.
Tae-kyung takes on the case of victims who lost their sight due to methanol poisoning while working for the Jungjin Group and confronts Jungjin Group's Vice President Tak Su-ho.
Tae-kyung reports to Chairman Song about the Jungjin Group's work, focusing on Tak Su-ho, but feels betrayed upon seeing Chairman Song greet Tak Su-ho.
Tae-kyung begins to question Tak Su-ho's identity and delves deeper into the methanol incident, growing more suspicious of Chairman Song's restraint.
Yoon Ah and Detective Ma cooperate with Tae-kyung to unravel the case as they learn about Young-mi's disappearance.
Yoon Ah and Detective Ma, while tracking Young-mi's whereabouts, discover a suspicious alley and begin their investigation after securing CCTV footage.
Tae-kyung goes to where Chairman Song and Jo Hyun-woo are and asks Jo about Jang Young-mi's location, causing tension.
Tae-kyung learns the truth about Chairman Song's connection to Tae-joo and feels enraged, while Chairman Song is pained by Tae-kyung's reaction.
Yoon Ah is shocked to learn that Seo Dong-seok received sexual favors at Namwon Restaurant, and Tae-kyung questions Chairman Song about his involvement.
Tae-kyung unleashes his anger on Chairman Song at a funeral, handing Dae-jin Young-mi's diary and suggesting an investigation.
Tae-kyung and his team, believing that Young-mi had been held in the secret room, chase after Jo Hyun-woo's car to rescue her. Meanwhile, Dae-jin delves deeper into his father's secrets.
Yoon Ah, armed with Jo Hyun-woo's recordings and testimony, summons Chairman Song, who warns her that investigating Jo will lead to Tae-kyung.
Yoon Ah becomes the head of the Special Investigation Unit and continues the investigation with Tae-kyung and his team.
With false accusations from Chief Choi, Chairman Song finds himself in a tight spot. Tae-kyung and Yoon Ah search for crucial evidence in the case.
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