Fleuve noir (2018)

Commissioner Francois Visconti, a battered policeman, is investigating, at first glance, a routine affair involving the disappearance of the teenager Dany Arnaud. Everybody seems suspicious to the commissioner: the sexy mother, and the laconic father, and even school teacher Jan Bellell, who unexpectedly offered the policeman his help in the search. The investigation loops from the suspect to the suspect, but there are no traces of the teenager, and there are less and less chances to find him alive.