In the film, which was screened out of the festival's main competition, Damon plays oil worker Bill Baker, who travels to Marseille, France to visit his estranged student daughter Allison in prison. She is serving time for the murder of her roommate, echoing the story of American student Knox and her then boyfriend who were convicted and later acquitted of killing British student Meredith Kercher at a flat in Perugia, Italy, in 2007.