Hotel del Luna is located in the heart of Seoul. It is not like any other hotels, but it’s a place for the dead souls. It’s clients are all ghosts, and it is not visible in its true form during the day. During the Goguryeo era, a rebel, named Jang Man-wol (IU) drank a liquor that unknowingly turned her into the hotel’s owner while she was traveling to find it. She has been stuck running the hotel for the past 1,000 years before meeting Koo Chan-Seong (Yeo Jin-Goo), the new manager.