Please answer the following question: Build a movie plot around this: Who stabs Steve in the neck? Abby.
A:
The film opens with Abby Russell at a night club where she explains to the audience via a narration that her "job" is to murder cheating men in order to "keep scum off of the streets"- a job that she thoroughly enjoys. She then murders a man by slicing through his femoral artery and then throwing him off the roof of the club. The following day she attends a ceremony where she watches Danni Rodgers, a nurse she had been mentoring, graduate. She then approaches her and meets Danni's mother and stepfather Larry Cook. Despite this joyful moment and all of her preparation, Danni is ill prepared for her first true day of nursing duty and is berated by Dr. Morris for her inability to respond quickly to an emergency situation. Abby views the situation with disgust, as she knows that Dr. Morris is a sadist that enjoys harassing new nurses.Abby is further irritated when Danni chooses to call her paramedic boyfriend Steve for support rather than approaching Abby herself. She's pleased when Danni's call to Steve ends badly due to a fight the couple had had previously that night over Danni's refusal to move in with him. She explains her actions to Abby by saying that she is unwilling to trust her stepfather enough to leave him alone with her mother. This distrust is later justified when Abby and Danni witness her stepfather having an affair while the two women are on their way to go drinking at a nightclub. Danni is upset at the encounter, which makes her more willing to drink later that night. However unbeknownst to her Abby spikes her drink with drugs, which enables Abby to get Danni to have sex with both her and random strangers. The next day Danni wakes to find herself in Abby's apartment and leaves despite Abby's entreaties for Danni to skip work and spend the day with her. After she leaves, Abby downloads several photos that she had taken from the previous night before leaving to see a psychiatrist, which is revealed to be Larry.Abby seduces Larry by saying that she's addicted to men, alluding to her past history...