Someone had been identified, but the true identities of the women remained unknown. The investigation hit another dead end, and new victims emerged. Among them was Rin, a girl who had been seen exchanging glances with an older man at a street corner. Thus, Asami, Aki, Rie, and Rin—four women—were brought into the Forbidden Room. No one would hear their screams from inside. In the final episode, the identity of the culprit is revealed, exposing a shocking truth.