Arang and The Magistrate

Arang and The Magistrate
A nobleman named Lee Eun-oh comes to town searching for his mother after hearing a rumor that she is staying at the village. He has the special ability to see spirits, but pretends he doesn't because he gets annoyed when spirits come up to him asking for a favor.
Arang has lost all her memories when she became a ghost and is unable to rest in peace until she finds out how she ended up dead. However, after appearing to three magistrates, none of them survive from the fright of seeing her. When she finds out that Eun-oh is able to see her, she begs for his help.
At first, Eun-oh rejects her request, but after seeing Arang's hairpin, which is the same hairpin he gave his missing mother, he changes his mind. He believes that if he helps her, Arang will regain her memories and tell him about his mother. He exasperatedly (then affectionately) nicknames her “Amnesia” and as the town's newly installed magistrate, together they investigate the circumstances surrounding her death, which may involve the mysterious nobleman Joo-wal and have supernatural ramifications.