7 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.
주 집사 (the head butler) addresses the family matriarch as 왕사모님 (wang-samonim), meaning something like 'the great madam' or 'the grand mistress of the house.' 사모님 is already a respectful term for the wife of a high-status man; the prefix 왕 (王, 'great/grand') marks her as the supreme female authority in the household, above all other 사모님-ranked women in the family.
황 경위 jokes that he came just to get a look inside a 재벌 (jaebeol) house — the massive family-owned conglomerates that dominate Korean business. Their private estates are famously fortress-like and off-limits to ordinary people, so sneaking a peek under the cover of police work is a running joke in Korean popular culture.
The newscast mentions that Han Ji-yong was buried with a 가족장 (gajokjang), a small private funeral attended only by close family. In Korea, the death of a major chaebol figure would normally trigger an elaborate multi-day public funeral (사회장 or 회사장) with hundreds of mourners. Choosing a 가족장 signals that the family wanted to contain information — which is exactly why the police are suspicious.
Jin-ho is having a 관상가 (gwansangga) — a traditional face-reader and fortune-teller — assess a job candidate using the man's 사주 (saju), the four 'pillars' of birth year, month, day, and hour. The reading mentions imbalances in 목 (wood), 토 (earth), and 수 (water) — elements from the five-phase system. Consulting a 관상가 before hiring, especially for sensitive household staff, is still practised in some wealthy Korean families who want someone both trustworthy and whose fortune aligns with the household's.
Detective Baek's suspicion that Hee-soo's amnesia might be a performance reflects a real legal tension in Korea: a defendant or witness who cannot remember events cannot be compelled to testify against themselves. Korean courts and investigators are trained to look for 해리성 기억상실 (dissociative amnesia) versus deliberate concealment, and the line between the two is genuinely difficult to prove — which is why the detective requests her medical records.
After Ha-jun runs into traffic, Hee-soo scolds him with a lesson that Korean parents and schools hammer repeatedly: when you see a car coming, you stop and wait — you never assume the driver has seen you. Korea's 민식이법 (Minsikilbeop), a strict child traffic-safety law passed in 2020 after a schoolchild's death, made this kind of parental lecture even more culturally resonant for Korean viewers watching this scene.
Detective Baek points out the uncomfortable overlap between Su-hyeok's 약혼식 (yagonsik — formal engagement ceremony) and Ji-yong's death on the same night. In Korean custom, a 약혼식 is a significant family ritual, often involving both sets of parents and an exchange of gifts, so holding one the eve of a crucial shareholders' meeting — and on the night a family member dies — raises obvious questions about what the party was really meant to accomplish.