Paris is enveloped by A mortal and strange mist. A set of survivors finds refuge over their capital's roofs and on the upper floors of flat blocks. With no information, electricity, water or food, a couple tries to endure this tragedy and rescue their daughter... However, because the hours pass by, 1 thing will become quite clear: there is no help in route, also if they would like to ensure it is through this tragedy living, they might need to try their fortune from the mist...