In this urgent and visually stunning documentary, Leonardo DiCaprio embarks on a global journey as a United Nations Messenger of Peace, confronting the stark realities of climate change. Driven by a deep personal concern for the planet's future, DiCaprio travels from the melting ice caps of the Arctic to the burning rainforests of Sumatra, witnessing firsthand the devastating effects of environmental destruction. He engages in candid conversations with world leaders, including Barack Obama, Bill Clinton, and John Kerry, as well as scientists and activists, all of whom offer sobering insights into the escalating crisis. The film’s central conflict lies not just in the overwhelming evidence of ecological collapse, but in the political and economic forces that resist meaningful change. With a tone that is both alarming and hopeful, director Fisher Stevens crafts a compelling narrative that challenges viewers to confront the truth about humanity's impact on the Earth. "Before the Flood" is a powerful call to action, blending breathtaking cinematography with urgent, thought-provoking dialogue about the single greatest threat facing our civilization.