Caplan Morlighem Vachewski and Roxane arrest Lemoine a big time bandit after extracting information from his attorney. But the man is released on a technicality. Meanwhile their charismatic team leader Rossi is accused of rape. A complaint has been lodged by Benaissa a man questioned by Rossi about a murder case. The police inspection services get involved. In an effort to clear their chief's name the 4 cops set out to solve the murder case in which Benaissa is implicated. Their lives will never be the same again...