Hidden is a film that follows the story of Ray (Skarsgård), Claire (Riseborough) and their seven-year-old daughter, Zoe, who are an average American family in Kingsville, North Carolina.
They have been living in a bomb shelter since escaping a day of devastation that changed everything. For 301 days, they have turned their cement prison into a home, holding on to memories of the past and hope for a normal life someday.
Throughout this time, they have managed to stay hidden from the threats that loom above the surface - the heavy breathing and booming footsteps that punctuate the night, threatening their fragile existence.
However, their safe haven is breached and something is coming for them. The family's peaceful existence is now at risk as they face the unknown dangers that await them.