Ho-chul pays a severe price for going against the rules, and Dong-joo dies at the hands of Tae-jin. Ho-chul realizes that the only way he can save his daughter is to follow Tae-jin's orders. Meanwhile, the special investigation team at Hwajin Police Station begins digging into the Rich Girl serial killer case and Dong-joo's murder. As they investigate Dong-joo's murder scene, they find evidence pointing to an unexpected person.
