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.
Top Billed Cast
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Lee Ha-nee
Jo Yeo-hwa (12 episodes)

Lee Jong-won
Park Su-ho (12 episodes)

Kim Sang-joong
Seok Ji-sung (12 episodes)

Lee Ki-woo
Park Yoon-hak (12 episodes)

Park Se-hyun
Yeon-seon (12 episodes)

Kim Mi-kyeong
Yoo Geum-ok (12 episodes)

Seo Yi-sook
Oh Nan-kyeong (12 episodes)

Jo Jae-yun
Kang Pil-jik (12 episodes)

Kim Kwang-kyu
Hwang Chi-dal (12 episodes)
Media
![[TEASER 2] By Day She's A Widow, By Night She's A Hero | Knight Flower | KOCOWA+](https://i.ytimg.com/vi/HBCI6Cc-B1s/hqdefault.jpg)
![[TEASER] By Day She's A Widow, By Night She's A Masked Hero | Knight Flower | KOCOWA+](https://i.ytimg.com/vi/8ay9IXefwHI/hqdefault.jpg)