From stealing secret documents to assassinating important people... secret societies operate behind the scenes of this world. Among them is a skilled female spy who always succeeds in any mission... Her name is Akari Niimura! When she receives an order to assassinate an important person, what she sees through her sniper scope is the figure of the hateful man who drove her father to death! Will she carry out the assassination mission with cold-hearted judgment? Or a burning Kokoro for revenge?