Roy (Alexander Skarsgård), Claire (Andrea Riseborough) and their daughter aged seven, Zoe, live in Kingsville, North Carolina and seem to form an American family rule – that if we exclude the fact that they live in a bunker of the dayIt has been a disaster that changed everything. For 301 days, they transformed the prison in cement in their own house, taking their memories and hoping to someday return to normal life. During these 301 days, the family avoided what lies on the surface – creatures that have destroyed mankind and threatens their fragile existence. So far, they have managed to remain hidden. So far! Their little paradise is penetrated … and something is coming after them.