Not Without Us follows seven grassroots activists from around the world to the 21st U.N. Climate Talks in Paris. With climate change already affecting their lives, they reveal what's at stake if a strong agreement to limit carbon emissions is not reached. Yet, the landmark Paris Accords, signed by 196 nations, is non-binding and fails to mention the main cause of global climate change: fossil fuels. How could this be? Not Without Us connects the dots. Between the inability of the U.N. process to address climate change and Big Oil's control over governments. Between the greatest economic inequality in the history of mankind and the oncoming climate crisis. The film demonstrates the importance of grassroots groups empowering mass movements to create the systemic change we need. Real change that comes not from top down, but the bottom up, organized by social movements to harness the greatest force we have: humanity.