The plot is simple. Yoon Ji Woo wants revenge. She will do anything to kill the person who destroyed her life. She was determined in the goal till the end. She is strong, brave, & good with fighting. 

But the story was predictable from the beginning; I know who is the real villain. It could've been good if Jeon Pil Do was more into the story. One good thing about the story is there is no side story going on; it focuses mainly on the female lead. 

I loved Han So Hee acting as vengeance women. She did great in the action sequences. 

It would've been better if they explained what happened to Yoon Ji Woo. They never clearly shown her ending properly.

The drama features intense and well-choreographed action scenes. Loved the action scenes.