In a world where mutants threaten the lives of Humanity, Seohyun, an average teenage girl who lived normal and balanced life comes to an end when the most famous military service organization invites her to join and fight. After the first war, due to her fascinating skills in archery, the general believed she was something much more. Havoc. With the fate engulfed in her, she experience ties in friendships and grew respect to whom once she hated the most, Corporal Kyuhyun. Will she able to set the world right? Or be the victim of it? [EDITING]