Rika has suddenly gone missing and Satoko coldly suspects Keiichi, who was the last one to talk with Rika, but Mion says that she saw Rika speaking with some men in construction uniforms. While looking for Rika, Mion pulls Keiichi away from a locked silo and indirectly informs Keiichi that Rika is trying to kill people and that she needs to put an end to string of murders occurring, which is being led by the Three Great Families.

Rena becomes increasingly frustrated with her father's affections for Rina, a showgirl at a gentleman's club frequented by her father. Satoko begins her plan to trap Rika in Hinamizawa by injecting Rena with H-173 as she sleeps in the nurse's office. Rena discovers that her father has been spending large sums of money on Rina taken from the settlement from his divorce from Rena's mother. Rena reflects on her parents' divorce and concludes that she did not try hard enough to stop the divorce and that some people are not deserving of kindness.