Feeling defection with his gun, Jigen looks for the world best gunsmith. Jigen finally finds out Chiharu, runs a tiny watch shop, is the one he seeks. Then Jigen meets a girl named Oto comes to ask Chiharu a gun. Jigen gradually reveal about Oto's secrets and know the misterious organization targets her. After Oto is kidnapped by the enemy, Jigen throw himself into desperate battle to save her.