Yi-gang makes her way to the temple where the monk shows her the prayer lantern that Jin-ok left for Jae-gyeong. The neighbour remembers a monk from the Mount Jiri temple attending the funeral. Yi-gang heads to Jin-ok’s house and finds out from her neighbour that she died of cancer. Yang-sun’s mother is there and doesn’t know anything about the 1991 incidents since she and her husband were running a restaurant elsewhere at the time. Gu-yeong goes to the hospital where Jae-geun has been in a state of shock since Yang-sun’s death. Our ranger trio splits up to investigate the five. There are five: Lee Jae-geun (Yang-sun’s grandfather), Jin-ok, Gil-yong, Woong-soon, and Sol. Yi-gang, Il-hae, and Gu-yeong use files on the murder victims and their knowledge of the 1991 deaths to list all the residents still alive. This time, we also see the culprit hit Hyun-jo’s head twice with a rock after he calls the station for help. We rehash the events of the attempt on Yi-gang’s life. She finds out from the Bidam Shelter rangers that he’s been researching Black Bridge Valley and ventures into the snow to find him. We jump back to 2019 where Hyun-jo cancels his meeting with Yi-gang after hearing the snowfall announcement. Yi-gang also tells Il-hae and Gu-yeong about the various victims that have seen Hyun-jo and shows them the footage of a stick moving by itself in one of his rock formations. He confirms that he’s seen Hyun-jo on the mountain but refuses to talk about Black Bridge Village even after Yi-gang tells him that old residents are being targeted. We cut to them outside the house of Hwang Gil-yong, another ex-resident of Black Bridge Village. Gu-yeong and Il-hae arrive back at the station wanting to know if Hak-su’s death is connected to the previous murders. The nurse caring for Hyun-jo calls Yi-gang with the news that they plan to take him off life support in two days. Episode 15 of Jirisan starts with Hyun-jo’s family hiking to the peak of Mount Jiri as a tribute to him.