Why a Cuckoo Cries(두견새 우는 사연)

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.