Mighty cumulonimbus clouds build up over France during a heatwave and discharge as sour downpour. The acid rain burns through everything: sheet metal, iron, meat, and bones. While the nation and the world teeter on the abyss and countless people flood elsewhere to escape the deadly rain, a separated family must pull together to survive. Director Just Philippot spins this simple yet eerie idea that doesn’t appear all that unrealistic into a modern, tightly paced eco-shocker, after which you’ll perceive every cloud as a potential threat to your existence.