The dramatic story of Kenyan Nobel Peace Prize Laureate Wangari Maathai, whose simple act of planting trees grew into a global movement. Kenya's Green Belt Movement was founded by Maathai who is the first environmentalist and African woman to win the Nobel Prize. Using archival footage and first-person accounts, the film documents dramatic political confrontations of 1980s and 1990s Kenya and captures Maathai's infectious determination and unwavering courage through in-depth conversations with the film's subjects.