Mathieu Sapin, a successful comic books author (Gérard, cinq années dans les pattes de Depardieu), creates an album to mark the fortieth anniversary of François Mitterand’s election. He turns to the figures in the shadows of the Socialist Party, in the forefront of which is Julien Dray known as the “Baron Noir”. Through anecdotes and firsthand accounts of those who spent time in the highest spheres of the French state since 1981, Mathieu Sapin attempts to answer the big question: “who killed the French left?”.