The administrator of Kanghwa province makes a secret alliance with the monk Yu Kwang-pil to betray the nation with the aid of the hostile Cheong Kingdom. The king's court learns of the treason and they send an undercover investigator to Kanghwa to learn how deeply the plot runs

The only son of a government official Yun loves Ok-hwa, the daughter of former gisaeng Gye-seon. But his father doesn't feel good about having a daughter of a former gisaeng as his daughter-in-law. He matches him instead with the only daughter of another official. Soon, Ok-hwa dies of lovesickness missing Yun so much. The ghost of her appears to Yun, who betrayed her and married another woman, to make him repent for his fault.