One day, the famous case agent Pil Jae (Kim Myung Min) and lawyer Pan Soo (Sung Dong-jin) received a letter from a death row inmate. The suspect Soon Tae (Kim Sang-ho) claimed that he was wronged in the murder of the daughter-in-law of a chaebol that shocked the society, and Pil Jae, as the case agent, also intuitively felt that something was wrong behind it. In order to expose the chaebol's brutality, Pil Jae and Pan Soo, the old jisang, teamed up to investigate and try to uncover the complicated inside story...