On December 7th, 2005, federal agents conducted a nationwide sweep of radical environmentalists involved with the Earth Liberation Front — an organization the FBI has called America’s “number one domestic terrorism threat.” IF A TREE FALLS: A STORY OF THE EARTH LIBERATION FRONT is the remarkable story of the group's rise and fall, told through the transformation and radicalization of one of its members, Daniel McGowan. Part coming-of-age tale, part cops-and-robbers thriller, the film interweaves a chronicle of McGowan facing life in prison with a dramatic investigation of the events that led to his involvement with the ELF. Using never-before-seen archival footage and intimate interviews — with cell members and with the prosecutor and detective who were chasing them — IF A TREE FALLS asks hard questions about environmentalism, activism, and the way we define terrorism.