On Halloween Eve, the killer Michael Myers escapes and begins his journey to Haddonfield, Illinois, his original killing ground. Dr. Ranbir Sartain, the psychiatrist who has been treating Michael Myers, and Sheriff Frank Hawkins are frantically searching for Michael Myers, who continues his killing spree and ruthlessly approaches Laurie, the only survivor of the last massacre. The trauma and stress of Laurie's narrow escape has scarred her mentally and made her suspicious, which has also caused her daughter Karen to gradually become estranged from her.