9 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.
병풀, sometimes called cica or tiger grass, is a leafy herb that has been used in Korean folk medicine for generations to soothe and heal skin wounds. It later became famous worldwide as the key ingredient in many Korean skincare products. The child offering it here is drawing on something she learned at home — a very ordinary piece of domestic wisdom.
명함 전단지 are small printed flyers — the size of a business card — that shops, clinics, and tradespeople distribute in apartment lobbies and letterboxes across Korea. Detectives often use them as trace evidence because a distinctive batch can be tied to a single location. Finding the same stack both at a victim's home and at a suspect's office is a classic forensic link in Korean procedural dramas.
붕어즙 is a traditional Korean health tonic made by slow-cooking whole crucian carp (붕어) for many hours until the liquid is very concentrated. It is sold in small pouches at health-food shops and pharmacies, and older Koreans in particular swear by it for restoring 기 (gi — vital energy) after illness or surgery. Barum's aunt bringing it over is a gesture of worried, practical love.
Korean broadcasters regularly air special investigative programmes focused on child sexual abuse, especially around anniversaries of notorious cases or when an offender is released. These shows are a genuine part of public discourse — they have historically driven changes to sentencing laws. The fictional programme here mirrors real specials that aired after landmark cases in the 2000s and 2010s.
The little girl asking the detective to kill Kang Deok-su when he gets out is a gut-punch moment that echoes real Korean media discussions about what victims' families do when the law feels inadequate. The folded note and the coins function like a symbolic contract — she is treating it with the seriousness of an adult transaction because no adult in her life has protected her.
The newscast reports Kang Deok-su's suicide attempt and immediately frames it as possible social pressure. Korean media guidelines (the 자살보도 권고기준) advise against sensationalising method or motive, but news programmes about high-profile criminals frequently debate whether societal hostility drove the attempt. This brief clip shows how quickly public opinion and media narrative compete after such news breaks.
전자 발찌 (electronic anklet) monitoring for released sex offenders was introduced in Korea in 2008 and expanded significantly after public outcry over several child abuse cases. Offenders deemed high-risk must wear one 24 hours a day and check in with a 보호관찰소 (probation office). The drama's plot point — Kang Deok-su cutting his off — reflects a real fear: ankle bracelets generate an alert only after the fact.
In Korean police culture, being stripped of your badge and uniform (경찰복을 벗다) is the gravest professional consequence imaginable — it means dismissal with a permanent blot on your record. Senior colleagues use the phrase as the sharpest possible warning to a junior officer. Kihyeok telling Barum that opening that cell door will cost him his uniform is framing a moral dilemma in the starkest cultural terms a Korean cop would understand.
'꼭꼭 숨어라 머리카락 보일라' is the classic Korean hide-and-seek chant, equivalent to 'Ready or not, here I come.' Children have sung it for generations; it literally means 'Hide well — your hair is showing!' Hearing it in this scene, while the audience knows Yuna is in danger, turns the most innocent childhood game into something deeply sinister.