Claire Bouanich

This is the story of a young girl named Elsa who was raised by a single mother (Isabelle) in the city. Isabelle and Elsa begin the film moving in next door to an elderly man who collects butterflies (Julien). Isabelle who "spends a lot of time with her friends" does not pay much attention to her daughter who walks home because her mother forgot to pick her up from school. After meeting her new neighbor, Elsa finds out about the butterflies and in short annoys Julien for a while. Julien receives a mystery package from a fellow entomologist. Julien sets out on his annual attempt to find a rare species of butterfly that he had once promised his son he would find (son dead) in the French country side, specifically a region known as Vercors.

Bank-robber Franck Adrien is serving a prison sentence after robbing a national bank. Before he was caught he managed to hide the money but now it's not just the police who are looking for the money. His cell-mate is Jean-Louis Maurel, an alleged rapist/child molester who claims his innocence. When the court finds Maurel not guilty, Maurel promises to look after Franck's family when he gets out. But one day, a man called Manuel Carrega tells Franck that Maurel is a suspected serial killer and that Franck's family is in danger. Franck escapes from prison and police officer Claire Linné and her team take up the chase.