Zhao Ruhua (played by Li Heni)

“Widow” has two looks. During the day, she is a dignified martyr girl and the daughter-in-law of a famous scholar-bureaucrat family. She lives quietly within the walls where she cannot see the outside world.At night, she will climb over the wall and transform into a masked heroine who saves people, helps people, and punishes evildoers.

Park Soo-ho (played by Lee Jong-won)

An officer in the imperial guard camp, “North Korea's perfect man” has excellent martial arts and a smart mind, but he is also an unlucky guy with no luck.While investigating the cause of death of his father who died tragically when he was young, he met Zhao Ruhua, who had a double life, and was involved in an unexpected incident.

Seok Ji-sung (played by Kim Sang-joong)

Zuo Yizheng, Zhao Ruhua's father-in-law, was a man trusted by the king and respected by the people.For his widowed daughter-in-law Zhao Ruhua, he is an infinitely kind and generous elder, but when it comes to national affairs, he shows political ambitions based on thorough belief.

Park Yoon-hak (played by Lee Ki-woo)

Deputy Zuo Chengzhi, Park Soo-ho's brother, is a member of the King's secret organization “Young Guards”.He is the second son of a distinguished family of heroes in the Joseon Dynasty. He grew up with King Yi Zhao when he was a child. He understands King Yi Zhao's pain and sadness better than anyone else.He looks weak on the outside but strong on the inside. He seems to be leisurely and even listless, but in fact he has a sense of responsibility and wants to shoulder the heavy responsibility beside the king and change this wrong world.

Yeon Sun (played by Park Se Hyun)

Ruhua's assistant, whose life was saved by Ruhua in the past, his writing skills are comparable to those of scholar-bureaucrats, his embroidery skills are better than those of famous ladies, and he is a versatile and intelligent person.

There are also a group of actors with rich comedy experience...