Sung-jun wakes up after getting hurt from the hostage situation. But the only things that greet him are his parents’ nagging and the news of another woman’s death. While the public believes the second murder is done by a copycat killer, Sung-hoon gets a hunch that Man-chun is innocent and that there truly is someone else behind the Joker cases.

The jurors are being targeted as the Joker murderer’s victims. As Ki-nam and Moon-kang learn that the cases are related to Hope Welfare, they collect evidence to find their daughters’ killer. Eventually, their investigation leads to the idea that Ryu Sung-jun might be Jung Yoon-jae. Believing this as a fact, Moon-kang kidnaps Sung-jun.

The eight people held captive and on the brink of death make it out alive. Sung Jun arrests Jung In Seong and takes him into custody. However, he needs more evidence to connect him to the other serial murders. He looks to Sung Hoon for help and manages to get a lead. Meanwhile, Eun Ki proposes exposing the truth about Hope Welfare Center to Sung Hoon.

It turns out Sung Hoon and Sung Jun’s parents are taking a big part in the secret behind Hope Welfare Center. Despite the sorrow, Sung Jun must arrest both of his own parents. After their arrest, Sung Hoon also gets arrested for the murders. Regardless of the judgment that he will get, he is relieved to fulfill his lifelong revenge.