Curtis (Michael Shannon) is a construction worker who works very hard to support his family. Fortunately, he has a harmonious relationship with his wife Samantha (Jessica Chastain) and a six-year-old hearing-impaired daughter Hannah. One day, Curtis was awakened by a very real nightmare. In the dream, there was a terrible tornado coming, it rained like tar, and the whole town was razed to the ground. Since then, similar nightmares have appeared frequently. Curtis gradually began to believe that this was an apocalypse. Everything that happened in the dream was brought to reality by him. He began to become irritable and silent. He also built a storm shelter at home and even lost his job. Samantha did not understand the series of changes in her husband. She thought he was sick and should see a psychiatrist. She also spent a lot of money on him to build useless things, buy expensive and useless gas masks, and was furious that he lost his job and medical insurance. Curtis's "symptoms" became more and more serious and more and more unacceptable. His situation depended on whether the storm he foresaw would come...