The Uninvited is a 2009 American psychological horror film directed by the Guard Brothers and starring Emily Browning, Elizabeth Banks, Arielle Kebbel, and David Strathairn.
Having been in a psychiatric institution for ten months, following her suicide attempt after her terminally ill mother died in a boathouse fire, Anna Ivers is being discharged and has no memory of the actual fire, though recurring nightmares from that night frequently plague her. Her father Steven, a writer who has dedicated his latest book to her and her sister Alex, picks her up.
At home, Anna reunites with Alex, with whom she is close. The sisters stand against Steven’s girlfriend Rachel, who had been their mother’s live-in nurse. Alex criticises Steven for sleeping with Rachel while the girls’ mother was still alive and sick in bed. Anna describes to Alex how scenes from her dreams have started happening while she is awake. The sisters become convinced that the hallucinations are messages from their mother, telling them that Rachel murdered her so that she could be with their father.
Anna catches up with her old boyfriend Matt, who tells her that he saw what happened the night her mother died. The two secretly plan to meet that night, but he fails to show up and she returns home. In her room, she has a ghastly hallucination of him and the next morning, his dead body is pulled out of the water, his back broken just the way Anna saw it in her vision. The police state he fell and drowned.
After the sisters are unable to find a record of Rachel with the State Nursing Association, they conclude she is actually Mildred Kemp, a nanny who killed three children she was paid to care for because she was obsessed with their widowed father. They try to warn Steven, but he ignores their concerns. The girls try to gather evidence against Rachel to show the police but Rachel catches them and violently sedates Alex. Anna escapes and goes to the local police station, but they do not believe her and call Rachel to take her home.
As Rachel violently sedates Anna and puts her to bed, Anna sees Alex in the doorway with a knife before passing out. When she wakes up, she finds that Alex has killed Rachel and thrown her body in the dumpster. When their father arrives home, Anna explains that Rachel tried to murder them but Alex saved them by killing her. Confused and in panic, Steven tells Anna that Alex died in the fire along with their mother. Anna looks down to find that the bloody knife is in her hand, rather than her sister’s.