In old Japan, there exists a group of people who are weapons for hire that act as vigilantes and enacts justice for those who cannot protect themselves. They call themselves the Shiageya and are highly skilled individuals who work through unofficial channels. Sae, Ryo, Matsubei and Shinsaburo work as a team with an impeccable track record. Their newest assignment involves finding the high official behind the random murders spewing about town. Although they trust each other to watch their backs during missions, there is a secret that Shinsaburo hasn’t told Ryo that may change the dynamic of the assassin group forever.