What’s Wrong With The Villainess

What are the actual chances of being summoned into a web novel with a system? In a comic or novels, 100 percent. But those are work of fiction. In reality, less than 0.00001 percent. Yet, that was what happened to her, Ann Kim, an overworked nurse who was merely looking for a way to destress after her shifts. What's worst, she became the main villainess, Evelyn, who is bound to be executed by the end of the novel!!!

Thrown into a foreign world with an incompetent "system" and nothing but her knowledge of the novel, she must embody the villainess and carry out revenge against the overpowered heroine in order to return to Earth. Will she be able to complete the mission before time runs out or will she be sent to the gallows with her fate as the villainess? Why was she even summoned here and what is with this suspicious "system"?