Three unlikely, unsuspecting souls who come face-to-face with that moment in their lives when they must stand and be counted. For Sheldon, it's difficult because he doesn't appear to be the brightest guy in the world (although he might be the funniest). For Colby, it's even more difficult because he's only 14 years old, and up against enormous odds. For Benji, it's almost impossible--because, after all, he's just a dog, lost and alone, with nothing but a belligerent bird and a bungling stray mutt to help. A band of unlikely comrades, brought together by the least likely of the bunch, for a common, courageous purpose. Things will change. Lives will be saved. Because Benji is off the leash!

It's October 30, 1988 and Michael Myers has been in a coma since his pursuit of Laurie Strode, 10 years ago, was finally stopped (events of H1 and H2). However when he is transfered from Richmond Mental Institute to Smith's Grove he awakes when he hears that he has a niece in Haddonfield and after killing the transfer crew he escapes. In Haddonfield, the niece, Jamie, has been adopted by the Carruthers family but keeps having nightmares about Michael (but she doesn't know who he is). On Halloween night, Jamie goes out trick and treating, little knowing that her murdering Uncle is following her and her step-sister Rachel. Rushing to her aid is Dr. Loomis and with the help of Sheriff Meeker starts to search the town for Michael and to find Jamie to protect her. But can anything stop Michael this time?