Everyone was herded into a small underground room, the door locking behind them, trapping them inside. It was dark and cold, with limited to no food or water, and only one person would make it out alive. The Human Gu ritual... a deadly game of survival. One by one, people around you were being slaughtered. You had been thrust into this horrific experiment by sheer accident. Through the chaos, you spot a massive man engaged in a brutal fight, Agito Kanoh.