Elanora Alphonia or Eiko for short, was a girl raised in a royal family. The royal life wasn't for her, sister of the king. The day right before her 18th birthday, her parents have decided to marry her off to fix the damage her brother caused with another Royal family. Angry by this, Eiko leaves home alone to clear her head, but is attacked by a golem on her way out. In disbelief, She fights back but soon she decides to accept her death. But, a man called phantom swoops in to save her. Like a guardian angel, he gets her out of her mysterious situation and now the 2 of them have to fight for their lives as they learn to understand each other and the world around them.