 The film traces the reasons of the murder of Dayton, Ohio, native Dorothy Mae Stang, a 73-year-old nun of the Sisters of Notre Dame de Namur order who fought for the preservation of the Amazon Rainforest in the Brazilian state of Pará.It also follows the trial of those convicted for murdering Stang.The film received the Audience Award and the Competition Award at the 2008 South by Southwest Festival, where it had its worldwide premiere.