Exposing the botched murder investigation of three young boys has left Milo Rigg's reputation and career as a crime-reporting journalist in tatters. But when the naked, frozen bodies of two young sisters, Priscilla and Beatrice Graves, are found down a ravine in Chicago months later, there are disturbing similarities. Are the two cases linked, and could this be Milo's chance to right the wrongs of the past?

Restored to his former reporter role, Milo is back - and he's asking uncomfortable questions again. Confronted with deception and corruption at every turn, can Milo uncover the identity of a ruthless serial killer and finally rid himself of the black cage that threatens to consume him?