In the Shadow of Iris (2016) on Netflix

Plot summary

Iris Doriot, a Parisian of thirty, is the wife of Antoine Doriot, a wealthy banker. One afternoon the couple has lunch, and afterward she disappears from the street. Hours later Antoine receives a call from a man who demands half a million euros for her return and warns him not to go to the police. Antoine goes to them anyway. His phone is tapped, and officers watch the station where he is told to leave the money. Detectives Nathalie Vasseur and Malek Ziani take the case, which brings them to a mechanic named Max Lopez, a man with debts and a house in foreclosure.