The plot of the movie revolves around Mary Portman, who is a psychologist living in Rural Maine. Her husband dies in a horrendous car accident and leaves her 18-year-old stepson Stephen in a disabled, mental state. When one of Portman’s young patients vanishes, she winds up that there is a kid’s phantom (Jacob Tremblay’s phantom) in her house.
Steven is a depressed child who was sent to boarding school. While his dad Richard is driving him to school, Steven and his dad get into a terrible contention, and the car moves into another path and a bad accident occurs. After six months, Richard Portman has died and Steven becomes inactive and paralyzed. His stepmother, Mary fulfills all his needs. Mary is a clinical psychologist and she works from home. Mary talks about Steven with her specialist named Dr. Wilson (Oliver Platt). She has chosen to place Steven in a home to be looked after in light of the fact that “Steven” is no longer there and he is only a body. She feels sorry for sending her stepson away.
She sees Tom is sleeping in her car. She brings him inside and makes a call, yet Tom vanishes. She calls the police and they start searching for him. Mary hears strange sounds in the house around evening time. One night, she sees Tom, who applauds his hand over her mouth to shield her from shouting. She discusses with Dr. Wilson about happening, and he credits it to Parasomnia. Dr. Wilson endorses her some prescription, so he sends a medical attendant to her home to do some work. Mary discovers that Steven is missing from his bed. She finds a little way to a crawlspace, opens it, and is snatched from inside by two little hands.
The following morning, she awakens on the floor. Steven is back in his bed; however has scratches all over the body. She gets two letters to leave home, one letter is from her colleague Lucy, and another letter is from Doug, however she declines both invitations. Mary has dreams of harming Stephen. In one dream, she pushes his head under the water while she showers him. In another dream, she sees that she goes into her farmhouse, then pummels the door on her stepchild’s fingers twice,
Dr. Wilson gets in touch with her through Skype. Mary denies taking any medicine and leaves without closure the call. Dr. Wilson sees Steven’s vacant wheelchair, and Steven strolls over. The lights go out in the house and Dr. Wilson loses his connection with Mary. Mary sees Tom in the basement, and simply then, Steven assaults her. He discloses to Mary how he woke up after the accident. Shut In is a great thriller movie having a great cast. The movie provides emotional ramifications and the story’s looming. This film has great anticipations and surprises, Watts acts awesome despite the fact that the character she is playing is not that deep.