It is a movie set in post-apocalyptic America, where a father and son are on the move to try to find a safe place to stay to avoid the cannibals plaguing the streets.
The Green Mile movie is an adaptation of Stephen King’s novel, and it is a crime-fantasy story. The story’s male protagonist is Paul, whose life changed after meeting an inmate with a special gift.
The Saw movies franchise is very famous, and Saw II is a continuation of the first movie, so you may have to watch that one to understand the references.