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.

A story of Naoufel, a young man who is in love with Gabrielle. In another part of town, a severed hand escapes from a dissection lab, determined to find its body again.

A teenage girl lives with her grandmother and worries she will be removed by social services. She sets off to get adopted by someone she admires more than anything, one of the most powerful women in the world.

When he leaves hospital, 30-something Basil moves in with his younger sister and closest confidant, Sarah. Living with a psychiatric disorder, Basil tries his best to re-establish a sense of normality in both his work and his love life. But, whilst hiding his illness from his new relatives, how long can he maintain this fragile stability?