It is the start of the 14th century and Philip IV the Fair reigns supreme over France. His three sons would rule after him. Isabelle, his only daughter, is married to King Edward II of England. Under Philip's reign, France is great but its people are unhappy. Only one power dares to stand up to him: the order of the Knights Templar. When the last Grand Master of the Temple, Jacques de Molay, is burned at the stake, he curses Philip and so begins a dark period, full of blood and violence, death and tears ...

Louis Mennechain is a modest locksmith. So imagine his amazement when Professor Piétrefond approaches him and tells him he recognizes in him a descendant of the kings of France, more precisely of Louis XVII (the king who never reigned). According to him he is none other than the monarch's great grandson. Louis's life is soon turned upside down as he becomes the center of attention of a group of ardent royalists. Even a duchess "gives" him her love to make sure that he accepts his role as pretender to the throne...