Halloween: H2O (1998)

After faking her death and changing her name to evade the murderous Michael Myers, Laurie Strode, now a teacher at a Southern California private school, is again targeted by her nemesis. Most of the school goes away on a trip, but her son John stays behind along with his girlfriend and a couple of other kids. John is now the age that Laurie was when Michael first attacked her friends, and she is scared and seemingly over-protective. But her fears are proved right when Michael returns to town, stalking first the teens and then Lauie herself.