A tycoon Lee Joong-Man murderd in 1998 by his personal driver Ji Se-Gwang whom having affair with Lee’s mistress Eun Bi-Ryung. Lee’s wife Park Gi-Soo wrongfully convicted of the murder of Lee. Ji Se-Gwang became a special inspection division manager at the Seoul Central District Prosecutors Office(SCDPO). A professional prosecutor Lee Cha-Don learns his past in relation to the conspiracy for the murder case.