A young boy is sent to an institution for the murder of his sister.It is Halloween night in 1963. Police are called to find that 15 year old Judith Myers has been stabbed to death, by her six year old brother, Michael. He is then sent to an institution where he escapes after fifteen years. No one knows what will happen on October 31st of 1978, but Michael Myers is headed back to Haddonfield and by the time the town figures it out it will be way to late for many people.