A dying man drags his oxygen machine into the office of Eric Besson, a lawyer in Paris's 13th arrondissement. The old man, an accountant, is carrying a dilapidated notebook full of meticulous investment records. For decades, he has been helping a cadre of dirty cops launder stolen money. The notebook contains his full confession--he's waited 50 years to make it, and now it can't wait another day. He is adamant that Besson get the notebook into the hands of La Proc, Paris's chief prosecuting attorney, so the corruption can finally be brought to light. But en route to La Proc, Besson's courier--his assistant and nephew--is murdered, and the notebook disappears. Grief-stricken Eric Besson tries to hire private investigator Aimee Leduc to find the notebook, but she is reluctant to get involved. Sequel to "Murder in Saint-Germain". 2018