The world is in irreversible decay. The countryside is overrun with arcane anomalies, which have confined humanity to cities and villages. Traveling between these settlements has become far too dangerous, isolating them from each other. Where once there was civilization, there are now only disconnected groups, that desperately try to survive on their own. The empire, that used to hold dominion over vast lands, is fighting a losing battle against these anomalies and has been in slow retreat ever since they first appeared.

Seemingly by chance, Cassie stumbles upon the uniform of an imperial postman and assumes the role in an effort to rebuild civilization in an area already abandoned by the imperial army. However, as she travels across the deadly lands, she soon stumbles into a much larger conflict between the hidden forces, that will shape the fate of the world.