Halloween H20: 20 Years Later (also known simply as Halloween H20) is a 1998 American slasher film directed by Steve Miner, and starring Jamie Lee Curtis, Adam Arkin, Michelle Williams, and Josh Hartnett. The seventh installment in the Halloween franchise, it is a direct sequel to Halloween and Halloween II, dismissing the events that take place in the sequels Halloween 4: The Return of Michael Myers, Halloween 5: The Revenge of Michael Myers and Halloween: The Curse of Michael Myers. The plot follows a post-traumatic Laurie Strode who has faked her own death so that she can go into hiding from Michael Myers, who finds her working as the headmistress of a boarding school in Northern California.
On October 29, 1998, Michael Myers (Chris Durand), who has been missing for twenty years since the explosion at Haddonfield Memorial Hospital, burglarizes Dr. Sam Loomis’ retirement house in Langdon, Illinois. Loomis’ former colleague, Marion Chambers (Nancy Stephens), who took care of Dr. Loomis until he died, arrives and discovers that the file on Laurie Strode (Jamie Lee Curtis), who is presumed dead in an automobile accident, is missing. Michael murders her, her teenage neighbor Jimmy (Joseph Gordon-Levitt) and his friend Tony (Branden Williams), before leaving the house with Laurie’s file.
In Summer Glen, California, Laurie, having faked her death to avoid Michael, lives under an assumed name, having a career as the headmistress of Hillcrest Academy, a private boarding school. Laurie is also in a relationship with Hillcrest guidance counselor Will Brennan (Adam Arkin). However, Laurie is far from happy, as the tragic events from 1978 still haunt her; she lives in fear that Michael may return. While a woman and her daughter are at a rest stop, Michael steals their car. At the academy campus, the students leave to attend a school trip to Yosemite, leaving only Laurie, Will, security guard Ronny Jones (LL Cool J), Laurie’s son, John, (Josh Hartnett) and his girlfriend Molly Cartwell (Michelle Williams) and their friends Charlie Deveraux (Adam Hann-Byrd) and his girlfriend Sarah Wainthrope (Jodi Lyn O’Keefe), who are having a Halloween party in the school basement.
Later that night, Laurie reveals her true identity to Will, when Michael arrives at Hillcrest and kills Charlie and Sarah. John and Molly are chased by Michael through the school grounds. Will and Laurie save John and Molly from Michael, and he and Laurie come face-to-face for the first time in twenty years. Will accidentally shoots Ronny, who had been patrolling the hallway, and Michael kills Will.
Laurie manages to get John and Molly to safety, before she engages in a showdown with Michael. Laurie stabs Michael numerous times and pushes him over a balcony. She prepares to stab him again, but Ronny, who survived the shooting, convinces her to stop. The authorities arrive at the scene and as Michael is loaded into a coroner’s van, Laurie steals the van with his body. Michael awakens and attacks Laurie, who stops short, causing Michael to fly through the windshield. Laurie drives the van into Michael, and she proceeds to drive off the road, down a steep hill. Laurie tumbles out, and Michael is pinned between the van and a fencepost. Laurie decapitates Michael with a fire axe, finally killing him. Laurie exhales in relief as the police arrive.