You don't remember much of your life except that your name is Logan, you have a sister, and those who experimented on you both tried to destroy everything. You soon wander for a way to sustain your vampiric abilities and end up coming across a girl who wants life in general to be easier. Soon, you and your sister were taken in by a figure that decided to teach you how to thrive with your powers. Soon enough, you meet the girl again, and a twisted, but beautiful love begins to blossom.