In a strange library in the heart of Brittany, a young publisher discovers an extraordinary manuscript that she immediately decides to publish. The novel becomes a bestseller. But its author, Henri Pick, a Breton pizza-maker who died two years earlier, would never have written anything other than his shopping lists, according to his widow. Persuaded that it is a sham, a famous literary critic decides to lead the investigation, with the unexpected help of the daughter of the enigmatic Henri Pick.