Silent Night, Deadly Night Part 2

On Christmas Eve four years after the events of the first film, Ricky Caldwell (né Chapman), the now-adult brother of serial killer Billy Chapman, is being held in a psychiatric hospital for a series of murders he himself committed. While being interviewed by the psychiatrist Dr. Henry Bloom, Ricky tells the story of the murders his elder brother committed throughout a series of several flashbacks.
After this, Ricky tells his own story: after Billy's death, he was adopted by the Rosenbergs, a Jewish family and given a good upbringing, but his trauma was never addressed. After his adoptive father's death, Ricky loses his composure and commits a series of random murders, targeting people who are "naughty". A chance for a normal life seems to appear when he starts dating Jennifer Statson, but an unpleasant encounter with Jennifer's ex-boyfriend Chip sends Ricky over the edge. He kills Chip by electrocuting him with jumper cables attached to a car, while Jennifer watches in horror, and then strangles Jennifer to death with the car antenna after she screams that she hates him. A security officer witnesses this and as Ricky is about to be arrested, he grabs the officer's revolver and shoots him in the forehead, before going on a shooting spree. He kills at least three more people throughout the neighborhood, including one man taking out his garbage. Eventually, Ricky finds himself in a stand-off with the police, and attempts suicide before being arrested.
Upon finishing his recollection to Dr. Bloom, Ricky strangles Dr. Bloom to death using audio tape and escapes from the mental hospital. He murders a Salvation Army Santa and steals his costume. Ricky plans to kill Mother Superior, the nun who abused Billy as a child, and whom Billy failed to murder four years earlier. After chasing Mother Superior throughout her house, Ricky succeeds in decapitating her with an axe. Ricky cleans up the blood and stages the scene, with Mother Superior sitting in a chair, her severed head balanced on her body. As soon as this is discovered by the police officers that arrive on the scene, a screaming Ricky leaps out and prepares to attack, but is shot down out the patio door. Sister Mary wakes up, and the police officer tells her, "He's gone, Sister. It's over." Then she turns over and sees Mother Superior's severed head, before screaming in terror.
Ricky suddenly opens his eyes and smiles devilishly, indicating that he survived his gunshot wounds. The final shot shows the arm of the murderer dressed in a Santa suit (footage from the first film) plunging a knife into the screen, before it freezes and the credits roll.