A violinist is found dead not far from the tomb of DaVinci, in a suspicious position. Captain of the Orléans research section, Alban Dutertre teams up with Officer Bérénice Amarillo. Alban and Bérénice will have to solve the puzzle.

Soan, 20, is a young man like many others but suffers from obsessive disorders. He would like to share his music in the open but the outside world seems hostile to him. Will he be able to overcome his difficulties to realize his artistic dream?

A group of friends leave the city for the weekend and camp near a lake in the middle of the woods. Between the campfire flames and the night sky, tensions begin to emerge.

The story revolves around the people of Sète, France. Their lives are punctuated by family rivalries, romance and scenes from daily life, but also by plots involving police investigations, secrets and betrayals.

The Section de recherches is a special unit of the Gendarmerie nationale, responsible for the most complex cases. In Bordeaux (from 2006 to 2013) and then in Nice (since 2014), child abductions, disappearances, heinous or sexual crimes are the daily lot of the investigators in this research unit. In the search for witnesses, the team is authorised to extend its investigations beyond France's borders.

Josephine Delamarre is a guardian angel that Heaven sends to earth. With her psychological insight, ability of persuasion and magical powers, she manages to help people who have problems. She appears at the beginning of each mission; when the mission is completed, she disappears with a click of her fingers.

Following the inexplicable sinking of a trawler and its fishermen who remain untraceable, Abigail, an oceanographer, is sent by IFREMER on a mission to Fécamp, her hometown, which she left a few years earlier following a family tragedy.