Stranded in the desert, the last of mankind is kept safe by a large border fence ... Until the fence falls.
Squid is a young orphan living under the oppressive rule of his uncle in the outskirts of the Territory. Lynn is a headstrong girl with an influential father who has spent her entire life within the walled city of Alice.
When the border fence is breached, the Territory is invaded by the largest horde of undead ghouls seen in two hundred years. Squid is soon conscripted into the Diggers-the armed forces of the Territory. And after Lynn finds herself at odds with the Territory's...

Salvation is a world away.
Trapped in a city no one knows exists, Squid lies dying as Nim fights for their lives. With every minute, their hope of getting the vaccine back to civilization is fading. From the brink of death and the edge of the world, Squid must once again conquer dangers even more sinister than the undead - the future of humankind depends on it.
But Squid's efforts will be wasted if Lynn cannot keep the people of Alice safe until he returns, and Lynn is now a hostage of the Holy Order. Forced to face punishment at the hands of the High Priestess, Lynn is at the mercy...