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.
Korean broadcasters normally blur the faces and withhold the names of crime victims to protect their families. Revealing real identities on air requires explicit written consent from next-of-kin — a step the show emphasises because it is genuinely unusual and emotionally weighty for Korean viewers.
몽타주 (montage) is the Korean word for a composite facial sketch — what English speakers call an identikit or e-fit. Korean police still release hand-drawn or digitally assembled composites to the public when a body cannot be identified, exactly as the broadcast describes here.
유흥업소 (yuheung-eobso) literally means 'entertainment establishment' but refers specifically to hostess bars and nightlife venues where female staff pour drinks and sit with male customers. Working in one carries heavy social stigma in South Korea, which is why the show stresses that Byeon Sun-yeong worked in the kitchen — not as a hostess — while raising her daughter alone.
믹스커피 (mix coffee) is a single-serve sachet of instant coffee, powdered creamer, and sugar — all pre-mixed — that you tear open and add to hot water. It costs almost nothing and is ubiquitous at Korean construction sites, factories, and night-shift workplaces. For someone grinding through irregular hours like Park Jong-ho, it is less a treat than a survival tool, which is why the detective treats it as deeply personal.
먹방 (meokbang) blends the Korean words for 'eating' and 'broadcast.' Creators stream themselves consuming huge quantities of food, and successful channels can attract hundreds of thousands of subscribers. It emerged in South Korea around 2010 and later spread worldwide. Jo Mi-jeong ran one to pay for college — a realistic detail, since mid-size channels in Korea can earn enough through ad revenue and viewer 'superchats' to cover living expenses.
Korean broadcast regulators (방송통신심의위원회) impose strict rules on language during live television. Swearing on air can result in fines or programme suspensions, so the crew's panic at Go Moo-chi's outburst is professional as well as personal — a single unbleeped word during a high-profile live special can trigger a formal complaint process.
대포폰 (daepophone) literally means 'cannon phone' — slang for a SIM card and handset registered under a stolen or fabricated identity so that calls cannot be traced back to the real user. South Korea requires real-name SIM registration, so obtaining a 대포폰 is itself a criminal offence, and detectives treating one as immediately suspicious is standard procedure.
Every major Seoul subway station has rows of 코인 보관함 (coin storage lockers) near the exits, originally designed for commuters to stash luggage for a few hours. Because they are cash-only, time-limited, and located in high-traffic areas with many cameras pointing at the crowd rather than the lockers themselves, they appear regularly in Korean crime dramas as dead-drop points — exactly as the suspect uses them here.
Koreans grow up with Aesop's fable in the same form as the Western version: the industrious 개미 (ant) stores food all summer while the 베짱이 (grasshopper) sings and plays, then begs for food in winter. It is one of the very first stories Korean children read in school, so the killer hiding a grasshopper on a victim famous for overworking immediately reads — to any Korean viewer — as a grotesque, deliberate inversion of the moral.
단테의 신곡 (Dante's Divine Comedy) is well known to Korean literature and theology students, and the 7대 죄악 (seven deadly sins) — pride, greed, lust, envy, gluttony, wrath, sloth — are a familiar concept in Korean popular culture through films and dramas. The detective's ability to name them all without pause signals that a Korean audience is expected to recognise the framework immediately.
거식증 (geosikjeung) is the Korean term for anorexia nervosa. There is a well-documented irony in the mukbang industry: several Korean creators have come forward about secretly purging after broadcasts to maintain their appearance while keeping up the performance of eating enormous amounts. The show uses this real tension to show the victim as someone suffering rather than indulging.
Han Seo-jun (한서준) is a convicted killer the priest visited in prison and chose to forgive. In Korean Christianity — and the show is visually coded around Catholic imagery throughout — 용서 (yongso, forgiveness) is understood as a spiritual act the forgiver does for their own liberation, not an endorsement of the wrongdoer. The priest's explanation that forgiving the man who destroyed his family finally let him sleep is a recognisable concept to Korean Catholic and Protestant viewers alike.
성당 (seongdang) is a Catholic church, distinct from the Protestant 교회 (gyohoe). South Korea has one of Asia's largest Catholic populations, and neighbourhood 성당 are common landmarks used as reference points for directions, which is why calling out a 성당 name to a taxi driver is an instantly understood navigation cue for Korean viewers.