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.
궁녀 (gungnyeo) were women who served the royal household and lived inside the palace walls, often entering as young girls and spending their entire lives there. Because they were considered the king's women, they were forbidden from marrying. Dying inside the palace without being properly laid to rest was thought to breed particularly powerful and vengeful ghosts.
승은 (seungeun) literally means 'receiving the king's grace' — the term for a court lady chosen to share the king's bed. If she became pregnant, she could be elevated in rank. The woman haunting the pond had reached this status but still met a brutal end, which in Korean ghost lore explains why her resentment is especially powerful.
옹주 (ongju) is the title for a princess born of the king and a concubine, as opposed to 공주 (gongju), which is reserved for a princess born of the queen. Being the mother of only an ongju — not a prince — left a concubine vulnerable to being sidelined at court, since producing a male heir was the primary measure of her worth and security.
무수리 (musuri) were the lowest-ranking female servants in the royal palace, responsible for hauling water, cleaning, and other hard labour. They were considered far beneath palace ladies in status. The fact that the ghost was a musuri who rose to become a royal favourite made her story scandalous — and her downfall all the more dangerous to acknowledge.
고신 (gosin) refers to the Joseon-era judicial practice of using physical torture to extract a confession. It was a legally sanctioned part of criminal investigation, applied even inside the palace walls when the accused was deemed to have committed a serious offense against the royal family. A forced confession under these conditions was still treated as legally binding.
악귀 (akgwi) is a particularly dangerous class of ghost in Korean folk belief — a spirit that has accumulated so much 업 (eop, karmic debt) in life that it cannot rest after death and instead causes harm to the living. It is distinct from a regular 귀신 (gwisin), which may simply be lost or seeking resolution. The show uses this hierarchy of spirits as a genuine threat system.
칠순 (chilsun) is the traditional celebration of a person's 70th birthday, also called 고희 (gohui). In Korean culture, milestone birthdays — especially 60 (환갑, hwangap) and 70 — are major family and social events marked with a formal banquet. For a queen dowager, this would be a grand court ceremony, which is why everyone is desperate for it to proceed without incident.
벽조목 (byeokjomok) is wood from a jujube tree that has been struck by lightning. In Korean shamanistic and folk tradition it is prized as one of the most powerful materials for warding off evil spirits, believed to carry the force of heaven's wrath. Weapons or charms carved from it are thought to be far more effective against ghosts than ordinary wood.
배냇저고리 (baenaetjeogori) is the tiny white jacket traditionally made by hand and placed on a newborn baby within days of birth. Mothers would sew it while still pregnant, stitching their hopes and love into every stitch. Here it represents the unborn child lost to torture and false accusation — an object so charged with grief and guilt that the ghost's lover has guarded it for decades.
귀매 (gwimae) is a specific type of spirit in Korean folk belief that mimics the appearance of someone deeply loved — a dead parent, a lost child — in order to lure the living toward death. It is considered especially treacherous because it weaponises the target's own longing, making it nearly impossible to resist without someone on the outside pulling you back to reality.
The accusation that a child caused its mother's death is one of the cruelest forms of emotional manipulation in Korean ghost narratives. Spirits — or demons impersonating them — weaponise 한 (han), the deep well of unresolved grief and injustice, to shatter a person's will. The implication is not just emotional torment but a literal spiritual trap designed to make the victim stop fighting to return to the living world.
Threatening to become an 악귀 (akgwi) and haunt the king is not mere melodrama in this context — in Joseon belief, a king who was haunted or killed by a spirit he had wronged would be seen as having lost the 천명 (cheonmyeong), the Mandate of Heaven. It would delegitimise his entire reign, which is why the threat carries real political weight beyond simple revenge.