It is the height of summer, and Armand Gamache and his wife are celebrating their wedding anniversary at an isolated, luxurious inn not far from the village of Three Pines. But they're not alone. The Finney family--rich, cultured, and respectable--has also arrived for a celebration of their own...

As the heat rises and the humidity closes in, some surprising guests turn up at the Finney reunion...and a terrible summer storm leaves behind a dead body. Now it's up to Chief Inspector Gamache to unearth long-buried secrets and hatreds hidden behind polite smiles. The chase takes him to Three Pines--into the dark corners of his own life, and finally to a harrowing climax.