Lilian, a thirteen-year-old factory worker in an industrialising town plagued by a serial killer, can see an invisible affliction within other people. When her search for her missing best friend ends with a confrontation with a demon — and learning that the affliction turns humans into demons — another demon named Lucian saves her life and promises answers. Her first clue is that demons are responsible for the many murders. Unfortunately, Lilian’s new lead has problems of his own — Demon Hunters, who claim Lucian is the serial killer and who see Lilian as an accessory.

Can her ability to communicate with these creatures be used to solve the crimes? Or will her connection to the Netherworld prove to be her own undoing…