So he's the monster. But is he the only one?"
When the identity of the serial killer is revealed, the village is plunged into fear and the police embark on emergency procedures to track the missing woman.
Despite being gripped by fear, Soyun sees a pattern in the Young Lady's killings that gives her a clue about how Hye Jin died, and she continues her solitary struggle to get to the truth about Hye Jin's death. But the closer she gets, the more dangerous and obsessive Young Lady's behavior towards her becomes.
Meanwhile Ji Suk, performing a memorial rite [祭] for a "person unknown" on her mother-in-law's orders, discovers a shocking truth in that place and, overcome by extreme terror, falls into a panic.