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 powerful church, she too escapes to join the Diggers.
Together Squid and Lynn form an unlikely friendship as they march to battle against the ghouls. Their journey will take them further than they ever imagined, leading them closer to discovering secrets about themselves, their world, and a conspiracy that may spell the end of the Territory as they know it.