13 timestamped notes explaining the Korean cultural context in this episode — customs, idioms, food, honorifics, and history, at the moment each appears on screen. These notes discuss events across the whole episode. To see them revealed scene-by-scene as you watch, use the episode page to find an airing.
Psalm 139 (시편 139편) is a famous scriptural poem about God knowing every corner of existence — light, darkness, sea, sky. In a Catholic Mass homily it would normally be read as a comfort. The fact that Yun is quietly reciting the same verses simultaneously, and that the two versions start to diverge, signals to Korean Catholic viewers that something is deeply wrong with this liturgy.
The lines the congregation recites — acknowledging they are unworthy to receive Christ but asking for a single word of healing — come directly from the standard Korean-language Catholic Mass (미사 통상문). Korean Catholics hear these words every single week, so when the words are later twisted or something goes wrong during the Eucharist, the contrast hits them immediately.
검은 미사 (geomgeun misa) literally means 'Black Mass,' a term for a ritual that deliberately inverts or parodies the Catholic sacrament. Accusing a priest of celebrating one inside a real church is an enormous scandal in Korean Catholic culture, where the Church holds strong moral authority. Yun saying this out loud, in front of the congregation and other clergy, is almost unthinkable.
나눔의 손 means 'Hands of Sharing.' Volunteer service groups affiliated with parishes are common across Korea, and they attract large, loyal memberships. Using that membership list to mobilize voters is a serious violation of South Korea's 공직선거법 (Public Official Election Act), which strictly prohibits organizations from engaging in electioneering activities. It's a crime that Korean viewers would recognize instantly as a real type of political corruption scandal.
구마 (guma) is the Korean Catholic term for exorcism, derived from the Chinese characters for 'expel' and 'demon.' The Church officially recognizes the Rite of Exorcism, and a 구마 사제 is a priest specially authorized to perform it. In Korea this role carries a heavy stigma — many clergy quietly distance themselves from it — so claiming lifelong illness as a result frames Father Yang as someone who has paid an enormous personal price.
부마자 (bumaja) is the formal Catholic term for someone believed to be possessed, used in official Church documents about the exorcism rite. It contrasts with the shamanistic vocabulary Hwapyeong uses. The fact that the disciplinary panel uses this precise Church vocabulary — not a casual word — tells Korean viewers this is an official ecclesiastical proceeding with real consequences for Yun's priesthood.
Under 교회법 (Canon Law), a Catholic priest in Korea who acts without his bishop's permission — especially in delicate matters like exorcism — can be placed under 징계 (jingye), formal disciplinary restriction. Being confined to a 징계 시설 (disciplinary facility) means the priest is essentially suspended and under supervision, similar to house arrest. It is a serious career-ending mark that Korean Catholic viewers understand would follow a priest for life.
국회 의원 (gukoe uiwon) is a member of South Korea's National Assembly, the country's unicameral legislature. They enjoy broad legal protections, including immunity from arrest during legislative sessions. The police team leader's panic about investigating one reflects real institutional pressure in Korea — targeting a sitting lawmaker without ironclad evidence can end careers and trigger political firestorms.
Detective Bong-sang half-sings '늙어지면 못 노나니' — 'when you're old you can't play anymore' — a line from a traditional Korean folk-style saying often quoted to young people as a reason to enjoy life now. It's a lighthearted, slightly nagging way older Koreans remind juniors not to be workaholics. His singing it at a crime-adjacent moment is classic Korean comedic relief through mismatched tone.
Earlier in the series Hwapyeong's grandfather described Yukgwang as a 강신 무당 (gangsin mudang) — a shaman whose power comes from spirits directly entering and possessing their body, as opposed to a 세습 무당 who inherits the role by lineage. This type of shaman is considered far more powerful and unpredictable in Korean folk belief. The grandfather's discomfort was not personal; it was a professional assessment of spiritual danger.
Father Yang's cryptic hint — 'a lost sheep will go home' — echoes the Parable of the Lost Sheep from the Gospels, one of the most familiar Bible stories to Korean Catholics. He is deliberately using scripture as a riddle, pointing the investigators back to Kim Sinja's own house. It's a chilling double meaning: he's quoting sacred text while directing people to a murder site.
떼끼 (ttekki) is an exclamation used in Korean shamanistic ritual (굿) to drive away evil spirits — a verbal command to begone. Hearing it come from a Catholic priest's body is a jarring collision of two completely separate Korean spiritual traditions. It signals to viewers that Yukgwang's spirit, rooted in shamanism, is still present and fighting even as his body is dying.
The Korean Catholic 구마 예식 follows the Church's official Rituale Romanum and requires authorization from a bishop. A priest performing it without permission, while under active disciplinary suspension, is breaking Church law at every level. Yun saying he will do it anyway — and calling it his '마지막' (last) — tells Korean Catholic viewers he is knowingly ending his priestly career in order to finish this fight.