The first evening in Paris Gamach meets as a family for dinner with Armand's godfather, billionaire Stephen Horowitz. When they go home together and watch with horror that someone knocks down to the ground and seriously hurts, which, as Gamache knows, is not an accident, but a deliberate attempt to murder. When Stephen finds a strange key, Armando, his wife Reine-Marie and Jean Guy Beauvoira, sends to the Paris Archive. It will dive deep into the secrets he has guarded for decades. Because of the horrific finding in Stephen's Parisian apartment, it is clear that the secrets are much darker and the danger is much larger and more immediate than they realized. Soon the whole family is entangled in a network of lies and fraud. To find out the truth, he will have to decide whether to believe his friends, colleagues, instincts and his own past. Even your own family ...