11 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.
종묘사직 literally means 'the royal ancestral shrine and the altars of earth and grain.' In Joseon, it was shorthand for the entire dynasty itself — its legitimacy, its bloodline, and its heaven-given right to rule. Claiming you alone can protect it is the highest possible power play a royal could make.
여제 was an official state ritual performed in Joseon to appease the vengeful souls of people who died without proper burial or family rites — especially epidemic victims. The government held them at city gates and crossroads to prevent those restless spirits from spreading more illness. Here the 박수무당 (male shaman) is conducting one inside the palace.
축시 is the traditional time-block from roughly 1 a.m. to 3 a.m., associated with deep darkness and the thinning of the boundary between the living and the dead. Rituals meant to contact or pacify spirits were deliberately scheduled for this hour because it was believed the spirit world was most accessible then.
세자 means Crown Prince. In Joseon's Confucian order, a son killing — or even wishing death on — his father the king was one of the gravest imaginable sins. The Crown Prince's ghost being driven by rage at his royal father inverts every duty that defined his existence in life, which is why Sang-gang appeals to that shared wound of an absent, indifferent father.
태초의 귀매 means 'the primordial ghost-demon' — a being that existed before all others. In Korean folk belief, the oldest and most powerful spirits are not the loudest; they manifest as deep, rumbling, animal-like presences felt in the earth and water rather than seen. Gu-cheon bargaining with it follows the classic mudang tradition of negotiating with a spirit rather than simply fighting it.
The king addressing plague victims directly — acknowledging that the state sacrificed commoners as a human buffer against epidemic — reflects a real Joseon practice where rulers performed public rituals of contrition after disasters. It was understood that unresolved royal guilt could itself become a source of hauntings and further calamity, so the confession is both spiritual and political.
각 고을 여제 refers to the same spirit-appeasement rites being held simultaneously across the provinces, not just in the capital. In Joseon, the central government would issue orders for local magistrates to conduct coordinated rituals during a major epidemic — a nationwide spiritual public-health response running alongside whatever medical measures existed.
사가 means a private home outside the palace. Sending a queen dowager (대비) 'to her private residence' was a severe political punishment — a polite way of stripping her of her ceremonial presence at court without a formal trial. The fact that she left with her sanity questioned makes the disgrace complete.
꺼먹살이 is a spirit from Korean folk belief that, unlike most ghosts, doesn't haunt a place — it attaches itself to a living person and slowly drains their vital energy (양기, yang-gi). The fact that it has followed Gu-cheon back out of the spirit world clinging to a living body becomes the clue that lets Sang-gang know he is still alive.
This is a well-known Korean saying that literally means 'one is different going into the outhouse than coming out' — in other words, people change their attitude once they've gotten what they wanted. Sang-gang uses it to call out the king for promising her freedom and then threatening to take it back the moment the crisis is over.
Throughout Joseon history, the palace was a place where princes routinely died by execution, forced suicide, or political exile — often killed by their own fathers or brothers to secure a single heir's position. Sang-gang seeing the lingering 혼 (souls) of kings and princes who never reached the throne is a direct nod to that bloody dynastic reality, where the palace itself accumulated centuries of royal grief.