Ottilie Colter and her brother, Gully, have always fended for themselves. So when Gully goes missing one night, Ottilie sets out to find him -- and soon makes a horrible discovery; Gully has been forcibly recruited by the Narroway Hunt, a secretive male-only organisation that hunts savage, blight-spreading monsters called "dredretches". Disguising herself as a boy, Ottilie infiltrates the Hunt -- but quickly realises that taking her brother home won't...