Xing Tian, an amnesiac 20-year-old backpacker arrives in the city of Faunus as her final traveling spot. On the first day in the city, she encounters a battlefield of soldiers and inhumane creatures called Glitches and becomes involved in the war between humans and monsters. With the device known as [Antivirus equipment] (A.V.E) she obtained, can she end the war between human and Glitches?