A brilliant female spy nicknamed "Butterfly" who is skilled at breaking into buildings. She has a myth that she can never be caught, no matter how tight the situation. However, the day has come when the myth of invincibility will crumble. The invincible, strongest female spy is finally captured and tortured. In such a miserable situation, humiliation and shame hit her all at once. And she experiences the depths of fear. Of course, this is a situation that she has never experienced before. An unprecedented and fantastical drama begins.