Mathieu owes everything to his friend Vincent : his house, his job, and even his life, ten years ago. With their wives, they are an inseparable quartet, and live the easy life on the French Riviera. But Mathieu discovers Vincent is cheating on his wife.
Paris, the late 1960s. Madame Claude is at the head of a flourishing business dedicated to prostitution that gives her power over both the french political and criminal worlds. But the end of her empire is closer than she thinks.
Sandra, Samuel and their visually impaired son Daniel have been living in a remote mountain location for the past year. When Samuel is found dead outside the house, an investigation for death in suspicious circumstances is launched. Amidst the uncertainty, Sandra is indicted: was it suicide or homicide? A year later Daniel attends his mother’s trial, a veritable dissection of his parents’ relationship.
Young and ambitious Captain Vivés has just been appointed group leader at the Grenoble Criminal Squad when Clara's murder case lands on his desk. Vivés and his team investigate Clara's complex life and relations, but what starts as a professional and methodical immersion into the victim's life soon turns into a haunting obsession.