In 1999, a robbery-murder case occurs in a small supermarket in Samnye, Jeonbuk province. The police investigation quickly narrows down to three boys from the neighborhood, and these boys are falsely accused of being murderers overnight and are imprisoned without understanding what is happening. The following year, veteran detective Hwang Joon-cheol is newly appointed as the head of Crime Investigation Division. He receives a tip about the real culprits and embarks on a reinvestigation to clear the boys' names. However, the interference of the detective responsible for the case at the time, Choi Woo-sung, leads to everything falling apart, and Hwang is demoted. Sixteen years later, the sole witness of the case and daughter of the victim, Yoon Mi-sook, and the boys return to Hwang, seeking justice...
A determined detective continues his search for the truth behind Asia's largest drug organization and its elusive boss he has unfinished business with.
Cho Jin-woong (조진웅) is a South Korean actor. Born Jo Won-joon on April 3, 1976, he is best known for his roles as Sejong's loyal bodyguard in Deep Rooted Tree (2011), a mobster in Nameless Gangster: Rules of the Time (2012), and a mysterious villain in A Hard Day (2014). He also gained recognition and praise for his performance as a detective in the television series Signal (2016).