Yoo Hye Jung was a tough bully in school with a prickly personality and always goes wayward. She had many scars from her childhood and through self-preservation, Hye Jung keeps her heart shut away from other people. However, she changes after meeting her mentor Hong Ji Hong who plays a key role in transforming her life from a helpless gangster to a compassionate doctor....

It is a dark and fantasy idol drama starring Ji-eun Lee (IU) and Jin-gu Yeo, and tells about a story that an elite manager in charge of hotel business becomes a manager of Hotel Del Luna by chance and runs the hotel together with the President who is pretty but haughty like the Moon.  "Welcome to Hotel Del Luna, we will provide you with the best services, but only for dead souls!"...