Black Butterflies

 Directed by Olivier Abbou and starring Nicolas Duvauchelle, Niels Arestrup, Axel Granberger, and Alyzée, Black Butterflies is a crime drama series which follows the protagonist, a depressed novelist who offers to write a memoir for a dying man because he is unable to find inspiration for his second book. However, over the course of time, he gets drawn into the person's violent past.