Paris is enveloped by An odd and mortal mist. A set of survivors finds refuge over the roofs of their capital and also on the top floors of flat blocks. Without any advice, power, food or water, a few of attempts to survive this disaster and rescue their daughter... However, since the hours pass by, one thing becomes quite clear: there isn't any help on the way, and should they want to make it through that catastrophe alive, they will have to try their luck in the mist...