A trio of malevolent dragons rises from slumber that had lasted for ages, emerging from deep within the earth to launch a savage attack against humanity. Their merciless onslaught involves devouring the vulnerable and absorbing the souls of their helpless prey, thereby increasing their own strength. The only chance for triumph rests on the shoulders of Takegami, a god from eons before who holds the title of Keeper of Darkness. Nevertheless, Takegami's abilities are restricted to the physical body they occupy, which is currently inhabited by an individual who is reluctant to participate in a fight.