During the Japanese colonial era, roughly 400 Korean people, who were forced onto Battleship Island 'Hashima Island' to mine for coal, attempt to escape.
Refusing to allow fate to decide whom she must marry, Princess Songhwa decides to find her own husband. She seeks the help of a man to interpret her marital harmony with four men she wishes to marry.
A boy who can see ghosts moves to a small town, where he befriends a female ghost. The two work together to investigate a masked ghost who is murdering students one by one.
