S1, E4: An undertaker who works in the mortuary on the fourth basement floor and a nurse who works in the Intensive Care Unit on the eighth floor begin their night shift at the university hospital. They face mysterious situations.

S1, E4: An undertaker who works in the mortuary on the fourth basement floor and a nurse who works in the Intensive Care Unit on the eighth floor begin their night shift at the university hospital. They face mysterious situations.