When Chief Inspector Armand Gamache of the Surete du Quebec is called to the peaceful village of Three Pines, he faces an unusual crime scene. A seance in an old abandoned house has gone horrifically wrong, and a villager lies still, spirited away - apparently frightened to death. Gamache soon learns that toxic secrets lie buried in the idyllic village, and something festering has clawed its way out.
And even Gamache has something to hide. He is shielding his team from a terrible truth. A powerful enemy within the Surete has planted a traitor amongst them.