Welsh musician John Cale, who previously collaborated with Mazuy on The King's Daughters (2000) and Sport de filles (2011), composed the original music score.

In Roquebrune-sur-Argens, people report to Gendarmerie Nationale about the return of Paul Sanchez, who fled from Cahors four years ago after having committed a severe crime.

This story even makes a local journal reporter, Yohann Poulain, forget the chief gendarme is driving a costly Porsche unlawfully confiscated from Johnny Depp, and investigate this case instead.

People never forgot about Paul Sanchez, who had killed his wife Violette with four children (Florent, Baptiste, Laura, and Marie) on 19 September 2006 in Cahors and had their corpses burned for an unknown reason.

For that reason, the reporter is contacted by a female gendarme named Marion Boulicaut who participates in phone calls with Sanchez upon his request.