Park Chanyeol and Kim Jongin are dutiful cops who chase the capture of a dreaded gangster, Oh Sehun. However, things don't go as planned when Chanyeol and Jongin kill Sehun's lover Luhan instead of arresting him. Sehun vows to avenge Luhan's death by killing them along with their loved ones, who happen to be Baekhyun and Kyungsoo. 
BaekYeol, KaiSoo and HunHan story.