Lizzie Higgs is gone, burned to death on her own hearth - but was she really a changeling? Albie Mirralls met his cousin only once, in 1851, within the grand glass arches of the Crystal Palace. Unable to countenance the rumours that surround her murder, he travels to Halfoak, a village steeped in superstition. Albie begins to look into Lizzie's death, but in this place where the 'Hidden People' supposedly roam, answers are slippery and further tragedy is just a step away.