The Guild is a fortress that trains people, in hopes of eradicating a breed of monsters that suddenly attacked the world and destroyed it. The attack lead to the death of millions and the few that survived fled to the Guild. In between all these is Arche, who not only lost her home and father, but also the relationship between her friends, who suddenly stopped talking to her with no reason. Could this be the doing of the Guild? Or something more deeper? Something she may never expect.