Danika Merrick suffers from increasingly disturbing, paranoid hallucinations. Most of her hallucinations involve threats to her family and media-fuelled fears such as child kidnappings, car accidents, her children lying and terrorism. Danika confides to her husband, Randy, and Evelyn, her psychiatrist. The movie begins with Danika apologizing for being late, being scolded by her bank manager about incorrect calculations. Her manager leaves the office, instructing Danika to remain there until errors are corrected. Danika then witnesses a bank robbery in progress with two trigger-happy robbers shooting anyone who moves. The alarm activates, and the robbers force Danika's boss to tell them where the security monitors are located. The manager points to her office where a shivering Danika seeks shelter in a corner. As the door opens, she expects to come face to face with a gun-toting bank robber, but is confronted by her manager who wonders what is wrong with her. The movie continues with increasingly paranoid hallucinations, due to schizophrenia, including seeing a little girl in front of her daughter's school being pulled away by a suspicious-looking man as she asks Danika to help her; Danika does nothing only to watch in horror as the same little girl's mother appears on the news begging for her child's safe return. Danika also finds a human head in a grocery bag as she's putting the groceries in the fridge. She's oblivious as, standing in front of the school looking for her daughter who ran off, her daughter's teacher is killed by falling glass,. She also believes her son's partner for a school assignment is trying to give him AIDS after she imagines the girl crawling into her bed and confessing she is dying from AIDS and is going to give it to Danika's son. Near the end of the film, the audience learns that Danika was in a car accident years earlier while driving her young children home and she makes a side visit to see Randy. The accident occurred immediately after Danika found out he was having an extramarital affair with the children's nanny, Evelyn, in a motel shower. Danika's vision of the nanny is that of her psychiatrist who's been treating her, revealing they were one and the same. During the confrontation, Evelyn reveals that she shares Randy's concerns over Danika's recent paranoia and her overprotective behavior is dangerous to the children. She also mentions that her family deserves better and that Danika needs to seek professional psychiatric help for her delusions. She responds by attacking Randy with a mirror shard and cutting his face. Before leaving, Danika pushes Evelyn to the bathroom wall and tells her that she's not only fired, but also stay away from her family. She drives away from the motel home with the children in tow. After witnessing Randy's affair with Evelyn, Danika psychologically breaks down when she ran the red light and her car is hit by a school bus. In the car accident, all of Danika's children die, leaving Danika as the sole survivor. It can be assumed when he found out about the tragic deaths of their children, Randy blamed the accident on Danika for having not listened to him and Evelyn when they told her to seek professional help for her delusions. It's also implied that he divorces her and Danika never sees him again. As the film ends, it reveals Danika's life after the accident. As a homeless woman, she sits on a bench at the scene where the accident occurred, basically reliving the events of that day, presumably every day out of guilt. All the events after the accident—reuniting with her husband and raising her children to adulthood, are an alternate world that Danika created to escape from her reality. They are caused by the tremendous guilt she feels for running the red light that led to her children's deaths. It's also implied that Danika has regrets over having not listened to Randy and Evelyn when they told her to seek psychiatric help that led to where she is now. She dejectedly gets up from the bench and slowly walks away pushing a shopping cart filled with her children's belongings and her rosary.
