It all starts from the murder case from five years ago that Do Chang was in charge of.

The execution of death-row convict Lee Dae Chul nears as well as the evaluation for Do Chang’s promotion. Knowing that Lee Dae Chul has an alibi at the time of the murder, Do Chang needs to decide whether to save an innocent man or to submit to the authority. Meanwhile, Do Chang and Ji Hyuk are joined by Seo Gyeong at Dae Chul’s old workplace, and that’s when Seo Gyeong gets a phone call from Park Gun Ho, who seemed to sound very urgent.