Before she was even born, Nyx was sold by her brutish father to the demon Gentle Lord that rules over Arcadia. He made a bet with the Gentle Lord, and lost, like many other foolish people in Arcadia. It has suffered for almost 1000 years under the Gentle Lord's rule and the demons that escape his castle from time to time. When a person lays eyes on a demon they either die or go insane. So things don't look too good for Nyx. She arrives at his castle, ready to kill him, as she has been trained, but things of course don't go according to plan.