Raised on a peaceful island, Charissa yearns to be with other human beings - but her sister keeps her mysteriously confined and alone.
Separated after a horrific encounter, Charissa is sent straight into the bowels of the earth - and the lost city of Metropolis Pietas. Amongst industrial decay and terrifying mutant creatures, her survival is threatened. Strange half-human, animalistic allies offer her refuge.
The cost of her new alliances is another matter. Now all Charissa wants is to see the light of day again. But her search for a return to the surface and her sister may take everything from her - even her own humanity. How many secrets have been kept from her? In the abyss of Misera, some truths are better left buried.