Yuri is a young man caught in the act of burying his mother. He is discovered by a beautiful young girl named Anna, who matter-of-factly offers to help him "properly" dispose of the body, removing all fillings and cutting off the fingertips to thwart identification. It turns out that Anne wants Yuri to become her partner in killing, though in fact it's much more than that.

Anna, Yuri, and Mitsuba continue their bloody vendetta against the Kakusei Group, a violent terrorist organization. Their actions place them in the crosshairs of the Public Safety Commission, but this is far from their only concern.

Inside the Kakusei Group, Yuri and Mitsuba learn that some truths are best left unknown. Women. Children. These are the faces of their enemy - of the lives they have already taken. As lines become blurred, the teens wonder if they've chosen the wrong side.