Tacit summary: In the near future, the world is a desolate place occupied by the undead. Strange crystals emit a deadly zombie virus as the last remnants of humanity struggle to avoid infection and survive. Despite all this, life is relatively peaceful for young Ruby, who lives in the Amina Safe Zone with her father and a small band of other survivors. All of this changes when Ruby encounters Arvan, a white-haired young man with pale skin and no heartbeat. This meeting sets off a series of events that force Ruby and her father to embark on a journey to discover the truth.