In the documentary, the UN Ambassador of Peace journeys around the globe to highlight the perils of a warming planet. According to TIFF documentary programmer Thom Powers' review of the film, DiCaprio travels to Alberta, Canada to see its toxic tar sands. He witnesses the frequently flooded streets of Miami Beach, Florida. He visits Beijing, a city shrouded by a constant cloak of smog. DiCaprio also explores Indonesia, a country toiling from forest fires caused by unsustainable palm oil development.