Serena Flanagan is forced to confront a disturbing case from her past: the murder conviction of a 12-year-old boy just released from prison. DCI Serena Flanagan hasn't heard the boy's name in years. Not since the blood on the wall and the body in the bedroom. Not since she heard him confess to brutally murdering his foster father. But now Ciaran Devine is out of prison and back in her life. And his brother, Thomas, is back too—the brother Flanagan always suspected was hiding something. When Ciaran's probation officer approaches Flanagan with new concerns about the Devines, the web of lies begins to unravel, setting in motion a deadly chain of events. "Deeply chilling, yet full of tenderness... utterly captivating... The best book yet from a tremendously talented writer," says the Sunday Mirror. "A quietly exquisite, sensitive plot," says The Times. "An absolute must-read," says the Irish Times. “DCI Serena Flanagan is the hero we’ve all been waiting for,” said Megan Abbott.