Please don't!

Lexi Lynn is just an "ordinary" girl that just having a fun time of her life, well by means killing people all the time. She is in a royal family that are filled with evil, she is the most important person of all man kind. Its because she is the rise of darkness and nothing cant get in her way but one day she meets this nice cute human Frank, that is really against evil. Can he help her to become on of the light or she'll stay in the darkness forever?