Humanity enjoyed a peaceful existence under the protection of valiant knights who ensured the portal gates to other worlds remained shut. Any monsters that managed to slip through were swiftly dealt with. However, everything changed one fateful day. The gates refused to close and the guests from the other world refused to obey. A young knight was wrongly accused of self-proclamation and thrown into a monster detention facility where he faced certain death. But his demise sparked a new beginning that would forever alter the course of history. That day, etched into the annals of humankind, marked the forced opening of the portal gates.