The owner of a copy of a work by Claude Monet is murdered and the picture stolen. But why go as far as killing someone just to take a simple copy? The investigation leads Antoine and Florence on the trail of a particularly talented copyist.

Antoine and Florence are on the trail of a particularly talented copyist of Claude Monet's work. They come to realise that the life of the one strangely mirrors that of the other. Worrying parallels lead them towards a sombre story of passion and jealousy.

Captain Verlay receives a set of Gustave Courbet's paintings postcards as a kind of treasure hunt. A corpse is discovered with each riddle solved.

The murderer inspired by Gustave Courbet seems determined to follow his Machiavellian plan right to the end. One question remains: why does he appear to address himself directly to Antoine?

A seminarian is stabbed to death. A tattoo on the victim's chest intrigues Antoine and Florence, leading them on the trail of a lost work by Hieronymus Bosch, a famous painter from the Flemish Renaissance with a fascination for demons and devils.

Antoine and Florence follow the trail of the picture by Hieronymus Bosch. As one discovery leads to another they realise that the murder of the seminarian wasn't the first crime committed in the name of this particular work.