While interrogating the suspect of the underwear thief case, Wanseung finds out that the suspect saw the silhouette of a man taking the laundry, but there was nobody that broke into the building. Wanseung and Seolok catch Jooyeon’s killer who attempted to make the murder look like the duct tape serial murder case. However, the real killer of the duct tape serial murder case strikes again. (source: Kocowa)