Nier wakes with a burning hole in his stomach and three questions: Didn’t I just die? Why does my best friend, Elir, have wings? And why are my comrades slaughtering their own families?

Hours before Nier died, Nier had one goal: to protect humanity and prove that not all light descendants are monsters like their ancestors.
Hours before Nier died, Elir also had a goal: to protect Nier at all costs.

But both goals failed miserably as Nier died, and Elir transformed into a Light, ending humanity's one hundred years of peace.

A hundred years after the Lights’ fall, the world teeters on the edge of chaos once more. Nier, the boy who wants to save the world, and Elir, the boy who would burn it all to save just one person, join the second squad in the Fratian army—the last standing nation's army.