A man who studies Mongolian history enjoys happy life with his wife. But one day after the president declares martial law, he loses his wife in a sudden accident. Struck by the immense shock, he loses his ability to speak. Now, the man must find his voice again in order to speak with the spirit of his departed wife.

Jihoon, the main character, guards the art museum alone. There is nothing for him to do other than sitting at the desk, answering phones, or organizing the museum. The museum is an empty space with only an Egyptian wooden coffin lying around. Only one or two people visit the museum a day. People who come are diverse, including women in their late 30s, Japanese, and middle-aged men. At night, visitors call the museum and make excuses for their deaths. Just three days after starting to guard the museum, Jihoon becomes distraught and crazy due to the strange energy of the wooden coffin and the museum and the incoming phone calls, so he quits working at the museum.