A egocentric bastard! This is how Clara, a bookseller, now describes the world famous writer Craig Anderson, who was her favorite detective story. Was, because their exchanges on social networks allowed him to discover a whole new side of Mr. Anderson, which is not very bright. After all, if he can't stand the reviews of his novels, he shouldn't read them! And, as if this unpleasant disappointment were not enough, this month of August in Paris is as deserted as it is scorching. Fortunately, an attractive Scottish tourist pushes the door of his bookstore La Caverne d'Ali-Baba almost every day and multiplies the pretexts to cross her by chance ...