Several generations of a family of bankers weather the tumultuous events of the 19th century. Fourth episode of a historical family saga in six volumes. 1861. The colossal profits generated by Haussmann's great work have made both branches of the Saint-Hubert family extremely rich. Despite the sometimes bloody, sometimes tragic secrets that poison this generation, a certain rapprochement seems to be in the works - motivated, of course, by money. A partnership aimed at taking advantage of Napoleon III's military adventurism. But a major, devastating war with Prussia is in the making, and on its heels, the events of the Paris Commune will seal the fate of some of the siblings .