Grim Reapers are tasked by one simple job by The End itself:

Kill a human being at a specific time, place and manner.

Equipped with Scythes, Grim Reapers have followed this task for millennia only to become more and more overwhelming and final.

And deviant.

These deviant Grim Reapers, Desperados, kill when they want to and how they want to, taking souls in the Afterlife and the World of the Living until The End had enough and created a class of Grim Reapers to combat this eternal war.

The Killrights.

Armed with weapons called Death Arms, Killrights are tasked to eliminate Desperados by any means necessary.

Meet Vadars Keinricht, a young soul (well, for his time) ready to do his part in the eternal struggle except his division is the lowest of the low, only assigned to do clean up and the occasional Sandbeast wipe-out. However, his division is more than what meets the eye.

And potentially preventing the apocalyptic collision of both worlds.