Desc: Le mystère Daval: Directed by Christophe Lamotte. With Michèle Bernier, Jérôme Anger, Thierry Neuvic, Vanessa Guide. Tearful Jonathan Daval (known as "Jonathann"), accompanied by his brother-in-law Grégory Gay, comes to report the disappearance of his wife, Alexia, to the police in his village of Gray, in Haute-Saône. An incredible investigation begins.