As scientists and world leaders struggle for solutions to the climate emergency that’s now a palpable reality, the controversial climate-cooling technology called solar geoengineering is entering the world’s stage. It’s an idea so powerful and full of uncertainty that even the proposal of research itself is seen as a dire risk by leading environmental activists and scientists. The film tackles the promises and peril of solar geoengineering with exclusive verite access to its protagonist David Keith and the SCoPEx project as well as the rogue geoengineers of Make Sunsets. From Bangladesh to Nevada, solar geoengineering is emerging after more than 60 years in the shadows, and with it, a new chapter of the climate change saga. Is it an idea too risky to explore?