A girl, a loner in highschool. She was on the urge of madness till she goes on a trip to a stable. Meeting a demon stallion named catastros. The stallion bonds with her but the thing she doesnt know is this horse is a cursed human from a different time, a deadly sin that has been following her since birth and will start to try and take over her, Will she find out the truth of this curse or be taken over by the evil spirit that has been haunting her for years? Find out in The deadly Prophecy.