The granddaughter becomes engaged to a man and the two begin to renovate her family apartment . They discover a notebook hidden in a wall . It belonged to the grandmother and includes a letter from the veteran . It reveals that the account of a sexually charged relationship between the grandmother and the veteran was entirely fictional ; she sent him that story sometime after they had parted to ask his opinion . He responded that passages were beautiful , nearly causing him to regret that they never did make love . He encouraged the woman in her writing and reassured her that she was not mad . In 2014 it was announced that Nicole Garcia would adapt the book for the screen with Marion Cotillard in the lead role . The film premiered at the 2016 Cannes Film Festival
2016 Cannes Film Festival
2016 Cannes Film Festival
From the Land of the Moon