Yukari Hanzo is a peerless warrior and assassin...really just trying to lead some semblance of a normal life. However, this delicate balance is thrown into a flux one day, when Hiro Takeda—her boyfriend and heir to the notorious Takeda family, whose father also happens to be her main employer—is assassinated...leading her even further down a grisly path woven through crime and bloodshed in Tokyo's criminal underground.