Q:Build a movie plot around this: How are Anna and Alex related? Sisters.
A:
Anna (Emily Browning) has been in a psychiatric institution for ten months, following her suicide attempt after her terminally-ill mother died in a boathouse fire. Now she is being discharged and has no memory of the fire, only dreams about it that involve three strange children. While packing, Anna is startled by a talkative patient. She is finally able to leave with her father, Steven (David Strathairn).At home, Anna reunites with her sister Alex (Arielle Kebbel). The sisters are very close, and they are united against Steven's girlfriend Rachel (Elizabeth Banks), who was their mother's live-in nurse. Alex criticizes Steven for sleeping with Rachel while the girls' mother was still alive, but he ignores her. Anna describes to Alex how scenes from her dreams have started happening while she is awake. The sisters become convinced that their mother is sending a message: the fire was murder, and Rachel is the killer.Anna sees her old boyfriend Matt (Jesse Moss) and kisses him. He tells her that he saw everything at the fire and the two secretly plan to meet, but he doesn't show up. Later, she awakens from another dream to find him climbing into her window. He says she needs to know the truth; he had a warning from her mother. His body warps, his back breaking. Anna runs from the room and suddenly it is morning and Matt's dead body is pulled out of the water, his back broken just the way Anna saw it.The sisters are unable to find a record of Rachel with the State Nursing Association. Finally they learn she is actually Mildred Kemp, a nanny who killed the three children from Anna's dreams because she was obsessed with their widowed father. They try to warn Steven but he gets upset and leaves for work. The girls try to gather evidence but they are confronted by Rachel who drugs Alex. Anna escapes and goes to the police. Skeptical, they call Rachel to sedate Anna and drive her home.Rachel carries Anna to bed. Anna sees Alex in the doorway with a knife and passes out. Later, Anna wakes and finds a large blood...