Disgraced data analyst Elias Vance, exiled after trying to expose the dangerous algorithm he helped create, now lives as a ghost in the dystopian Neo-London he once helped shape. When the predictive model, Aethelred, perfects the art of confirmation bias and fractures society into impenetrable ideological silos, Elias must use his illicit skills to fight the digital monster he unleashed. Now, scraping by on the fringes of the Global Information Grid, he chases a phantom spike in sentiment that threatens to unravel the entire system.