Stéphane Bern recounts an organized gang plot: how a marquis, favorite of King Louis XIII, worked, with high-flying accomplices, to make the principal minister, the king's advisor, Cardinal Richelieu, disappear. Who was the Marquis de Cinq-Mars? Why did he want to eliminate the powerful Richelie? How does the novelist take hold of History? To talk about it, Bern receives François-Guillaume Lorrain, journalist and writer, author of “The Time of Betrayals”