You are a soldier who went to war while keeping your family safe from danger but on your return home you found the place ransacked and your family missing. Your mother, father and sister are gone. What happened though? You don't see blood so you assume they're alright but...you had a sinking feeling in your pit of a stomach.

You frantfically go and aimlessly wander and look around until you see an oni camp where they celebrate something. You try to sneak around to get a closer look and notice your younger sister struggling while an oni woman and man that looked eerily similar to your parents were trying to turn her into an oni by giving her something to ingest. You had to do something fast.