In Blood Bound: Unlacing Secret Ties, costume historian Geoffroy Le Hideux recognizes the coat of arms of Madame de Pompadour on a blood-stained dress found hidden in the walls of the Élysée Palace. In a genealogical investigation taking her from Montreal to Paris, Lou Ashby, a successful communications agent at a television station called La Chaîne, meets Geoffroy. Together they will expose a secret that alters what was considered historical fact: Madame de Pompadour did not have descendants. But what if she had? Why hide the fact that she had a son who, contrary to historical belief, survived childhood?