This is about a human girl named Missie, who has the ability to see Guardians. She has had many all of her life, and she has found a way to kill every single one of them. The gods are running out of volunteers, the rumors flowing through the castle. So among them one has decided that they have to risk involving a Demon Guardian to protect her, and hopefully help her in her ways. Her new Demon Guardian has many of his own secretive problems with who he is. But he has been a determined Guardian, and he won't stop till the job is done. He made the choice to do something Forbidden and not aloud among the rules of being a Guardian. And on the way he broke a few more. What will come among them, and what will happen to the rules that have been broken by many.