Lee Cha-don grew up in an orphanage and became a prosecutor, one of the most respected professions in Korea. But, as it turns out, it also can be one of the most corrupt professions, with plenty of opportunities to shake down gamblers and pocket some extra cash. With no memories of his past, Cha-don’s fate is inextricably tied with Bok Jae-in, the daughter of a loan shark who funded Cha-don’s upbringing and education and wants to be repaid for the investment. And a senior prosecutor, Ji Se-kwang, who is responsible for the trajectory of Cha-don’s life, pretends to be a righteous prosecutor while hiding the misdeeds of his past.