From NetFlix:

Michael Shannon stars in this thriller as a small-town family man who, determined to protect his wife and deaf daughter from impending disaster, builds an impenetrable storm shelter in the safety of his own backyard.

Because the film is so true to life in the U.S., I found watching this film a very wrenching experience. What you experience is a devoted family man’s gradual descent into the clutches of paranoid schizophrenia. Perhaps I should not have told you this but soon enough you would guess the truth. This film is not science fiction nor a horror film. But in fact it is a horror film in the sense that you sit there powerless to prevent this good, well-meaning man from following the dictates of a mental illness even while he knows he has the disease (his mother developed the same illness when she was 30 and abandoned the family in a journey to the streets). In fact this is the first time I have seen portrayed the difficulty of realizing that a mental illness is directing your life and figuring out how to fight back (with the help of a professional over probably what will be a long period of time).

Three aspects of Americana that makes this film so hard to watch are things like: the difficulty in getting and affording a competent psychiatrist, the perilous way in which so many middle-class American families live just on the edge of bankruptcy and the damage that losing a job and its health benefits does to a family.

Only toward the end of the film do his wife and associates begin to understand that he has a mental illness. Meanwhile his actions cause all kinds of trouble for himself, his wife, his company, and his friends. Watching a climactic breakdown at a supper for parents of deaf children (his daughter is deaf and needs a cochlear implant) is a horror show in itself.

Michael Shannon is agent Nelson Van Alden in the TV series “Boardwalk Empire”. His acting here is phenomenal: understated, sadly driven, and possibly violent.

Be prepared for a tough but worthwhile trip.