12 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.
젓갈 (jeotgal) is a traditional Korean condiment made by salting and fermenting seafood — fish, shrimp, or squid — for weeks or months. Homemade jeotgal from a rural grandmother or grandfather is considered far superior to anything sold in stores, so the grandfather's pride in offering his own batch is completely natural. Sending food by courier (택배, taekbae) to city-dwelling family members is a very common practice in Korea.
세습무 (seseum-mu) refers to the tradition where shamanic practice is passed down within a family, usually from parent to child. Unlike spirit-called shamans (신내림무당), hereditary shamans inherit ritual knowledge and performance skills by birth. Hwa-pyung's father resented being expected to continue this lineage, especially after watching his mother endure its hardships.
An 인력사무소 (inryeok samuso) is a walk-in labour dispatch office where workers show up early in the morning hoping to be assigned to a day's construction or manual work. There is no guarantee of work each day, and wages are often squeezed by the agent who takes a commission. It is a last-resort livelihood for people without stable employment or a fixed address.
Hwa-pyung's father immediately demands to see a crucifix before he will open the door. In Korean folk belief and popular culture, Christian symbols — especially the cross — are treated as proof that a visitor is human rather than a possessing spirit. This mirrors how holy water and crosses function in Western exorcism tradition, but the impulse here is also shaped by decades of syncretic mixing between Catholic ritual and older Korean shamanistic fears of malevolent spirits.
Hwa-pyung drinks alone straight from the bottle — a distinctly raw way to consume 소주 (soju), Korea's most common distilled spirit. Drinking without food (안주, anju) and without company signals emotional distress rather than social enjoyment. Gil-yeong's exasperated comment about 'straight soju on an empty stomach' captures the Korean cultural expectation that alcohol should accompany food and companionship, not replace them.
In the flashback, Hwa-pyung's father explains he replaced the couple's original silver wedding band with a gold ring set with an 에메랄드 (emerald) — his wife's 탄생석 (tansaengseok, birthstone). Upgrading a wedding ring with a gemstone gift is a meaningful romantic gesture in Korea, often done on anniversaries. The fact that this ring later turns up among a dead priest's belongings is what drives the entire reunion subplot.
The investigation keeps returning to Gye-yang-jin, a small coastal village that functions as the drama's mythological origin point. In Korean storytelling, the 고향 (gohyang, hometown or home village) carries enormous moral and spiritual weight — it is where family karma begins and where unresolved evil must ultimately be confronted. The fact that the village elders refuse to speak the name 'Bak Il-do' aloud reflects the real Korean folk custom of treating a malevolent entity's name as a verbal taboo that could summon it.
The grandfather's furious reaction to hearing the name 'Bak Il-do' said aloud inside his home reflects a deep Korean folk belief: naming a malevolent spirit invites its presence. This is similar to the taboo around saying 호랑이 (horangi, tiger) in the mountains. The word 금기어 (geumgi-eo), meaning forbidden or taboo word, is used explicitly later to describe how 'Bak Il-do' functioned in the family and village.
The elderly witness recalls that the possessed man, Yi Cheol-yong, had been a chauffeur in Seoul who drove Japanese passengers — placing his backstory firmly in the Japanese colonial period (1910–1945). High-ranking Japanese officials and businessmen employing Korean drivers was commonplace then. This detail grounds Bak Il-do's origin story in a specific historical trauma, something Korean dramas often use to explain how evil entered ordinary people's lives.
Hwa-pyung's father shouts that he will kill himself rather than face his son again. In Korean dramatic and everyday speech, saying '죽어버릴 거야' (I'll just die) can be an expression of extreme desperation rather than a literal plan — but in this scene the character's long history of trauma and instability makes it genuinely ambiguous. The door stays closed, and Hwa-pyung backs away, treating the threat as real.
Father Yang uses the term 부마자 (bumaja), the Catholic term for a person under demonic possession who has become the subject of an exorcism rite. Korean Catholicism imported this vocabulary directly from Latin (daemoniacus). The drama deliberately contrasts this formal church language with the shamanistic vocabulary the family uses — two different Korean traditions trying to name and deal with the same phenomenon.
When the father finally says '미안하다, 용서해라' (I'm sorry, forgive me), he uses the plain speech level — the form a parent uses to a child — even in this moment of deep remorse. In Korean hierarchical speech, a parent asking a child for forgiveness while still speaking in plain form is emotionally significant: it is a full apology that doesn't require the parent to abandon their role, making the moment tender rather than humiliating.