Daisy Stone, who was once the last glimmer of hope to save the world from its beloved serial killer, is now on the hunt for revenge.

With her fiancé, Harrison Bishop, behind bars, Daisy finds herself at the center of a new conspiracy as it spirals out of control against the backdrop of a congregation of adoring fans. But Molly Jordan, Daisy’s closest ally, detects the cracks in her best friend’s façade and is determined to find out the truth about their hidden lives.

Upon their reunion, Harrison and Daisy discover the odds are stacked against them, including a cryptic data leak, a blood debt they must repay, and the imminent danger posed by a new medical breakthrough that tempts humanity with excessive power. With a series conclusion that will shock readers until the last page, the pair will have their final battle as they must decide: which monsters will survive their collapsing reign of terror?