"Why does she stop mourning her husband's death and leap off a cliff?" In this Joseon era, women were bound by the duty of serving their husbands for a lifetime... Lady Jo Ye-hwa, the daughter-in-law of the Left State Councilor's residence, followed the "virtuous wife" path as her duty. She had lived for fifteen years after losing her husband on the day of her wedding. During the day, she appeared as a modest young lady under the strict supervision of her mother-in-law. But at night, she became "Danju," the popular upper-class entertainer, and even played the role of a "righteous person" helping the weak. She led a double life. On the other hand, there was Im Su-ho, a government official uninterested in advancing in society or women. He attended the Left State Councilor's 60th birthday celebration and happened to glimpse the beautiful daughter-in-law, Ye-hwa, who was known for her beauty. His heart raced unexpectedly. "Why am I feeling this way?" Furthermore, that night, he encountered a masked vigilante with incredible archery skills... "This arrow is aimed at my heart." "This voice... a woman?!" The fact that this skilled and nimble vigilante was Ye-hwa was a secret! Facing the challenges of investigation before Lady Jo Ye-hwa, a widow, and the indifferent youth Su-ho, will they overcome the obstacles and find love?