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In this new detective novel, Joël Dicker, the contemporary Swiss writer and winner of the Grand Prix de la Académie française and the Prix Goncourt des lycées, intrigues readers once again with his intricate crime solving.

Forty-five-year-old police captain Jess Rosenberg, a unique investigator who has solved every case he has ever taken on and earned the nickname Captain 100%, decides to retire. At the farewell ceremony, during which dozens of colleagues honour him, journalist Stephanie Mailer appears and says that twenty years ago, in the very first case that became a defining moment in Rosenberg's career and radically changed his life, the captain made a fatal mistake that led to the accusation of an innocent man of murdering four people.

A few hours later, Stephanie Mailer, who is investigating the old crime on her own, mysteriously disappears. Captain Rosenberg decides to hold off on retirement and takes over the investigation...

And the case is reopened.