During his night shift at the antique museum, the new guard discovers clues left behind by Jacob, the previous guard who mysteriously vanished. Jacob didn’t leave voluntarily; something forced him to abandon his post, leaving behind a bleeding jade hairpin that points to an unexplained danger. As the night deepens, the current guard faces the museum’s ominous third rule, which now threatens his safety. The episode ends with the guard confronting this escalating peril, unsure what supernatural force or hidden secret will challenge him next.