Film Idea (4)

• A girl and her twin brother do everything together and have no other friends.
• The twin girl begins to make friends with other girls at school and her brother becomes jealous.
• The girls she becomes friends with are each mysteriously murdered one-by-one and the girl fears that she will be next. The girl is mentally affected by the deaths and has flashbacks of her past as as a little girl when she pushed her childhood friend in a lake when playing and she drowned. She was treated horribly by people who judged her as a "devil child", which lead to a very insecure upbringing and having to move towns every time a resident found out about the death.
• The boy becomes increasingly protective over his sister and she begins to suspect him to have committed the murders. Though she keeps her suspicions to herself as she believes he would never do such a thing.
• One day the twin sister finds a knife in the bedroom she shares with her brother but still she protects him and he tells her to never tell anyone about what he has done because he knows a secret about her that no-one else in the town knows; the murder at the lake.
• However, one day the girl decides to tell her mother about her suspicions of her brother. The mother becomes very distraught and tells her they will deal with it the next day.
• The following day, the girl is woken up in a hospital and a doctor explains how they had to perform tests on her. They discover that her mental health had deteriorated over time and she was having frequent hallucinations. The girl is admitted to a psychiatric hospital, one day the girl asks why her brother hasn't visited and her mother explains to her that she had no twin brother, he was just a figment of her imagination that she conjured up after her distress of the treatment she received after killing her friend. She asks if she will ever leave the hospital and her mother tells her that she cannot, as she has murdered, and not just murdered the little girl at the lake, but she murdered  her friends too.