“Some doors were sealed for a reason. You didn’t open it… it opened you.”

 After a royal residence is restored for a gala re‑opening, curator Seo Ji‑woo (Bona) discovers a hidden wing that’s not on any blueprint. Night watchman Do Hyun (Yook Sung Jae) follows footprints that start in the middle of a hallway; the new patron (Kim Young Kwang), heir to the estate, insists the palace’s tragedies are “brandable myth.” Teaser flashes: court masks hanging upside down, a pavilion pond rippling without wind, ink on scrolls moving like centipedes, a bell that rings from underwater, and a fan dance filmed in daylight that plays back with no dancers—only ash. Doors return you where you started; portraits blink; the throne room floor breathes. As gala music shifts into a low chant, a lacquered door slides open, revealing a room of shoes facing the wall.

 Verdict: Dread‑dense, elegant Korean gothic—needle‑sharp sound, candle‑black visuals, and slow‑creep terror promise a midnight‑crowd chiller with teeth.