Chan Yeol feels guilty. Guilty for only one thing : For making her not escape from this horrible place. For using her as a experimental piece.

Chan Yeol's a genius-minded scientist and wizard who's on the process of testing his new invnetion, which is hoped to help people live again, after being dead. This is expected to be one of the most expected innovations of the century, but he is particularly hating it. Why?

Because he needs someone to test this on. And that was an innocent girl– Jang Ji Na–  who was killed for this experiment.

Not that he feels guilty for killing people; in fact, he's killed many during his college days because of his exceptional wizardry; It's just that... he doesn't like the fact of admitting who he killed. And neither the fact that he's developings feelings for the dead girl.