La Voleuse, meaning 'the thief', is a 1966 French drama film directed by Jean Chapot, with a screenplay by Marguerite Duras.
Set in Germany, it tells the story of a childless couple where the wife (Romy Schneider) steals back a little boy she gave away in her teens and the husband (Michel Piccoli) gradually persuades her that the childless couple who lovingly raised the child have the better claim.
The little boy is now six and lives happily in Essen with a childless working-class couple, a Polish immigrant called Radek and his wife.
The media took up the case, with most of the country on the side of the honest couple who raised the boy and against the selfish mother.
Shortly before Radek's deadline, Werner persuades Julia to give the boy back, but it is doubtful what kind of marriage is left for the pair.