In the distant future, Japan has isolated itself from the rest of the world. The Takemikazuchi - once the protectors of the royal elite - now survive as a band of ruthless assassins for hire. Yuki, a Takemikazuchi assassin, learns the truth about her mother's death and confronts the clan's leader Byakurai. Outnumbered by the assassins, Yuki runs for her life and finds refuge in the home of Takashi, a man striving to make a living by running a gas station in the middle of nowhere. But with Byakurai and his assassins closing in on her whereabouts, Yuki must continue to fight in order to fulfill her destiny as princess of the Takemikazuchi.