Follows a Christmas-loving man who gets obsessed with bringing Christmas cheer to all, and causes a fight when the homeowners' association informs him that the event he planned violates the rules of the neighborhood.
Based on actual events of American serial killer Edmund Kemper, who murdered his grandparents at age 15 and, after being paroled for that crime, killed eight women in 1972 and 1973 including his own mother.