Jung Ga-yoon, a minor villain, is murdered. Killed, of all people, by Baek Ga-yoon, the female lead of the same drama. Right before her death, she desperately grabbed onto something swirling with black malice, like a drowning man clutching a straw. Little did she know it was an evil spirit. When she wakes up, a timer is engraved around Jung Ga-yoon's neck. 12:00:00 At that moment, the evil spirit whispers. 『I'm weak right now. The evil spirit lacks 'evil'.』 Repeated malicious actions make the evil spirit's power grow stronger. 『You have 12 hours, Cinderella.』 She must commit evil deeds within that time to stay alive. In her moment of bewilderment, a staff member calls out to her. “Ms. Jung Ga-yoon. It's time to shoot!” Her role is a villain. A villain. Malicious actions. Could she perhaps use this to her advantage? She couldn't miss this opportunity. After all, she had to survive. She would survive and pay Baek Ga-yoon back for everything.