Cho Yeo Hwa has been a widow for 15 years. Her in-laws are the most prestigious noble family in the kingdom. During the day, she leads the life of a widow devoted entirely to her dead husband's memory and rarely ventures outside the gate of her home. At night, Yeo Hwa dons the mask of Hero, who secretly jumps over the surrounding wall to save the helpless.
Cho Yeo Hwa has been a widow for 15 years. Her in-laws are the most prestigious noble family in the area. During the day, she lives quietly at home and never goes outside. But, during the night, Yeo Hwa secretly jumps over the surrounding wall and takes care of people who need help. In the process, she gets involved with Park Soo Ho, and she begins to dream about her future. Meanwhile, Soo Ho is a senior officer. He is good at his job and has an attractive appearance.