Yann Baillieu, a washed up hack for La Voix du Nord, the Lille based provincial newspaper is serendipitously propelled into a medieval mystery of epic proportions when he visits Metz with his new glamorous associate Lily Chevalier and discovers his image on a 15th century carved wooden door. Their quantum consciousness odyssey then takes them on a journey across France in a heroic effort to solve the puzzle that is the d'Arc Conspiracy.