Mongeville et Magellan: Un Amour de Jeunesse (2018)

Delphine is a middle-aged art expert who is engaged by a wealthy Bordeaux art collector to organize his collection for public display. When he is stabbed to death, and she disappears along with the centerpiece of the collection, she becomes the prime suspect in his murder. Two of her old high-school sweethearts, each with a long career in criminal investigations at opposite ends of the country, join forces in a race against the clock to find Delphine and prove her innocence. Their task is enormously complicated by the fact that both of them are operating entirely outside their respective jurisdictions.