Plot
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. Ji Se-kwang, a senior prosecutor, is responsible for the trajectory of Cha-don's life, pretends to be a righteous prosecutor while hiding the misdeeds of his past.
In 1998, a wealthy businessman, Lee Joong Man was killed by Ji Se-kwang, and all his property goes to his mistress Eun Bi Riyeong (later: Angelina). Lee Joong Man's wife, Park Gi Soo was accused for that murder, and sentenced to prison. After Park Gi Soo was imprisoned, Lee Joong Man's son, Lee Kang Seok(later: Lee Cha Don) having nowhere to go, went to Ji Se-kwang' apartment, and discovered that Ji Se-kwang was having affair with Eun Bi Riyeong, both had conspiracy for the murder of Lee Joong Man. Lee Kang Seok tried to tell the lawyer and a reporter, who was involved in his murder case, but both of them were bribed by Ji Se-kwang and stayed silent. Ji Se-kwang, in order to cover all the crime he had created, tried to kill Lee Kang Seok. Lee Kang Seok while running away from Ji Se-kwang, was hit by a car, and lost his memory. The person who hit him, Madam Bok Hwa Sool, funded Lee Kang Seok' study, and wished that he becomes a prosecutor.
Ji Se-kwang, who killed Lee Joong Man, and plotted the whole murder, lives as a respected, righteous prosecutor. Lee Joong Man's mistress Eun Bi Riyeong, went to USA after the murder case is closed. Both the lawyer and the reporter lived successfully and became famous people in Korea.
Later in 2013, when Lee Kang Seok/Lee Cha Don worked as prosecutor, he learned about his past, and tried to take revenge on the five people (Ji Se-kwang, Eun Bi Riyeong/Angelina, the lawyer(Prosecutor Kwon Jae-gyu), the reporter(Reporter Go) and Lee Joong Man's lawyer (Hwang Jang Shik).
