Armed with only a baseball bat seventeen year old Niko struggles to provide for her two younger brothers in a post-apocalyptic landscape where the rain burns like acid, food grows increasingly scarce and any Slither that crosses her path is laid low before it can sink its teeth into her. Then one night everything she'd ever worked for and loved is consumed by a raging fire, leaving her with one brother missing, the other dead and herself gravely injured. She's rescued by the Rose Circle, a rogue group of Slither hunters. They sneak her into Amaryllis City, a decadent metropolis where those able to pay the exorbitant entrance fee live a life of relative ease. But for Niko, Amaryllis City is not the haven she grew up believing it would be and her unique abilities as a Slither hunter make her a particularly visible target to a city with hopes of experimentation, replication and other nasty bits. All Niko ever wanted to do was find her baby brother, but that's proving to be harder than she ever expected.