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.
The device going off here is a 삐삐 (bbibbi), the Korean word for a pager or beeper. In the early-to-mid 1990s, pagers were how Koreans sent short numeric messages to each other before mobile phones became widespread — you'd page someone with a phone number or a simple numeric code, and they'd find a payphone to call you back. A pager ringing in a 1990s drama instantly signals that era.
A staff member is surprised to see the anchor carrying a pager in 2012 — by then, pagers had long been extinct in South Korea, completely replaced by smartphones. Her bewilderment is completely natural: a 삐삐 in 2012 is as out of place as a rotary phone.
The anchor's closing remarks reference 박근혜 당선자, meaning President-elect Park Geun-hye. The drama is set in December 2012, right after the presidential election, so this is a real, timely political reference woven into the fictional broadcast. Mentioning a president-elect in an investigative news segment was a pointed editorial move — implying the incoming administration should take note of the hospital scandal.
A 독서실 (dokseosil) is a pay-by-the-hour silent study hall, common across South Korea. Students rent individual desks with small partitions so they can study late without disturbing their families at home. Many used the study hall's landline as a contact number — which is why a 1990s pager was registered under the name of one in Seongbuk-dong, a hilly residential neighbourhood in northern Seoul.
The producer grumbles about a 줄기세포 (stem-cell) scandal knocking their mountain-climb story down the running order. This is a nod to the real Hwang Woo-suk fraud case — a disgraced Korean scientist who fabricated landmark stem-cell research. The scandal broke in 2005 and remained a cultural shorthand in Korea for a sensational news story that dominates everything around it.
선우 asks the detective to find him a local 셰르파 (sherpa) who knows the old terrain well. Sherpas are an ethnic group from the Himalayan region of Nepal renowned as high-altitude guides and porters, and the word has become the standard Korean term for a mountain guide in this region. Hiring a knowledgeable local is practically mandatory for navigating restricted or off-map routes around Annapurna.
선우 states flatly that he believes his older brother died searching for a time machine. In Korean dramas, this kind of blunt, matter-of-fact delivery of an impossible claim — rather than a dramatic outburst — signals that the speaker has moved past disbelief and into a quiet, settled conviction. It lands harder precisely because of how calmly it is said.
The mysterious man explains that someone left behind nine sticks of incense in 1992, each one capable of transporting the user exactly 20 years into the past for the duration it burns — roughly 30 minutes. The number nine (아홉) is the title's key word; in Korean culture nine is not particularly unlucky or lucky on its own, but the drama uses it to mean both a finite count and an echo of the nine realms concept from Buddhist-influenced folklore about time and fate.
The detective is baffled that 선우 found a vinyl LP of 'The Bodyguard' soundtrack on a Himalayan mountainside. The 1992 Whitney Houston film and its soundtrack were a massive hit in South Korea — 'I Will Always Love You' was inescapable that winter. An LP from that specific year is both a plausible keepsake for someone who traveled to 1992 and an instant nostalgia trigger for Korean viewers who lived through that era.
선우 mentions watching 'The Bodyguard' at 서울극장 on Christmas Eve 1992. Seoul Theatre (서울극장) was one of Seoul's most iconic single-screen cinemas, located in Jongno, and for decades it was the prestige destination for first-run Hollywood blockbusters. Going there on Christmas Eve with a first love was a quintessential early-90s date — Christmas Eve is treated in Korea almost like Valentine's Day, as a romantic couple's night out rather than a family holiday.
민영 is riffing on 선우's terminal diagnosis by proposing they skip the wedding ceremony and treat their time together as an immediate honeymoon. In Korea, a full formal wedding (결혼식) with a ceremony hall, matching hanboks, and a banquet for hundreds of guests is the traditional expectation — suggesting they skip it entirely is a deliberate, affectionate act of defiance against social convention, not a sign of casual commitment.
선우 has been recording voice messages addressed to his best friend 영훈, framing them as evidence in case his illness makes him seem irrational later. Leaving a 음성 메시지 (audio message) as a kind of pre-emptive testimony to a trusted friend is a narrative device rooted in the Korean cultural value of 의리 (uiri) — loyalty and mutual obligation between close male friends — where you trust your oldest friend above all others to be your witness.
선우 says he is sending a Christmas card for the first time in 20 years. In 1990s Korea, mailing physical greeting cards — especially at Christmas and New Year — was a genuine social ritual between friends, lovers, and family. The practice faded sharply with the rise of mobile messaging in the 2000s, so framing a message as a 카드 (card) is a tender, slightly melancholy nod to how people once expressed care at a distance.