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.
상중 (sangjoong) literally means 'in the middle of mourning' and refers to the formal period immediately after a family death, typically covering the wake through the burial. Korean social norms strongly discourage any confrontational or business activity during 상중, which is why Jin-cheol reasons Sun-woo will stay put at the 빈소 until the funeral ends.
The word used here, 임종 (imjong), refers specifically to the moment of death, often at a bedside with family present. In Korean culture it is considered deeply important to be at a loved one's side during 임종; missing it is a source of lasting guilt and grief. The hushed, reverent atmosphere around this moment reflects that weight.
성당 (seongdang) is a Catholic church. South Korea has a large Catholic community, and spending the night in the church in private prayer is a recognised form of vigil-keeping during crisis. The fact that Young-hoon stayed there all night signals he was wrestling seriously with his conscience, not just passing time.
Young-hoon is referring to Jung-woo's death by self-inflicted injection, saying that the life Sun-woo worked so hard to save ultimately ended that way. The phrase he uses — 스스로 끊었어, literally 'cut off by himself' — is a common Korean euphemism for suicide.
For Catholic families in Korea, the funeral typically moves from the hospital 빈소 (binso, the wake room) to a 성당 (church) for a Requiem 미사 (Mass), and then to the 장지 (jangji, burial site). This three-stage progression is the standard Catholic funeral structure and explains why the secretary is mapping out tomorrow's schedule so precisely.
A 빈소 is the room set aside in a hospital or funeral hall where the deceased lies in state and mourners come to pay respects. In Korea, close family members traditionally stay in the 빈소 around the clock — leaving, even to sleep, can feel like abandoning the dead. This is why Sun-woo tells Min-young that one person standing watch is enough.
The charges being read out — illegal egg harvesting from female researchers and buying eggs from undocumented foreign women — directly echo the 2005 Hwang Woo-suk scandal, one of the biggest scientific frauds in Korean history. Korean viewers would feel the reference immediately; it gives Jin-cheol's crimes a chillingly real-world texture.
법정 구속 means the judge orders the defendant taken into custody on the spot at the moment of sentencing, without being allowed to go home first. It is relatively rare and signals that the court considers the person a serious flight risk. The chaos in the courtroom — lawyers shouting, cameras firing — is exactly how such a scene plays out in Korean legal dramas and real life.
종로 경찰서 (Jongno Police Station) is a real, well-known police station in central Seoul, in the historic Jongno district. Mentioning the official 직인 (seal/stamp) from that station on a 1993 evidence envelope tells us the item is a sealed piece of physical police evidence from thirty years ago — the kind of thing that could still surface and reopen a case.
Sun-woo has been reading his own teenage 일기장 (diary) to reconstruct what his past self did on the day of his older brother's wedding. Keeping detailed personal diaries is common among Korean students, and the drama uses this culturally familiar habit as a clever plot mechanic — the diary is essentially a witness statement from the past self Sun-woo can no longer remember.
Sun-woo staying on a call with Young-hoon while he has been stabbed is a moment that plays on the Korean cultural concept of 마지막 말 (majiimak mal) — last words to someone close. Choosing to spend his final conscious moments talking to his friend rather than calling for help tells the audience everything about the weight of their bond.
Earlier in the episode the bureau chief told Sun-woo to ask if he ever needed help, using the formal language of a 선배 (senior colleague) making an offer. Sun-woo now invokes that exact promise verbatim. In Korean workplace culture, directly quoting someone's own offer back to them when asking for help is a recognised, face-saving way to make a difficult request without seeming to beg.