Meet the Morvan family: the father heads the French police, the eldest son follows in his father’s footsteps, the younger son is a successful financier and a long-time drug addict, and the daughter is a failed actress but quite successful as an escort girl. The family members are tightly bound to one another, all the more tightly because they are united by mutual hatred. Then a series of strange murders breaks out in France, exactly resembling those committed in the seventies in the Congo by the notorious serial killer nicknamed the Nail Man. But Morvan the father solved those old crimes long ago. So who is operating in France, and why are the blows aimed at the family of the number one policeman? Will the Morvans withstand the attacks of an unknown enemy, or will they fall victim to their own passions?..