Police commissioner Herville is found dead in a Chinese restaurant in the 13th arrondissement of Paris. Gilou must break the news to Laure, who is being treated in a Police rehabilitation center. Now in charge of the unit, Gilou begins investigating with Ali, a young cop, fresh out of training. They quickly find themselves on the case of a break-in gone wrong and the trail of 15-year-old Ryan, a juvenile delinquent. Roban learns he must soon retire but still manages to oversee the Herville case. Awaiting trail, Joséphine struggles with life in prison.
《齿轮第七季》是一部法国律政悬疑犯罪电视剧,第7季中在第 13 区的一家中餐馆发生的一起双重凶杀案引发了更广泛的洗钱网络和政府腐败事件,其中警察局长赫尔维尔就是其中被杀之一。Gilou必须把这个消息告诉Laure,Laure正在警察康复中心接受治疗。现在负责该单位的Gilou开始与刚刚结束训练的年轻警察Ali进行调查。Roban知道自己很快就退休,但仍设法监督Herville案。在等待审判的过程中,若泽芬一直在监狱里挣扎。