It is Winter Carnival in Quebec City, bitterly cold and surpassingly beautiful. Chief Inspector Armand Gamache has come not to celebrate but to recover from an investigation gone hauntingly wrong. But violent death is inescapable, even in the seemingly peaceful Literary and Historical Society--where an obsessive historian's search for the missing remains of the founder of Quebec ends bizarrely in murder. Injured himself and in need of rest, Gamache cannot walk away from a crime that threatens to ignite long-smoldering tensions between the English and the French.

Meanwhile, he receives letter after letter from the village of Three Pines, where beloved Bistro owner Olivier was recently convicted of murder. "It doesn't make sense," Olivier's partner writes every day. "He didn't do it, you know." Despite the overwhelming case against Olivier, Gamache sends his deputy back to Three Pines to make sure that nothing was overlooked.

Through it all, in his painstaking quest for justice, Gamache must relive the terrible events that killed one of his men before he can begin to bury his dead.