It was 6 different groups telling their own stories but they didn’t add up nor connect. The stories were so timed apart from each other that when you went back to that story you couldn’t remember what it was about. So you’re sitting there confused on what you are watching. Then at the end it fast forward through all the stories in the future and you’re even more lost. I believe if i rewatched this movie I still wouldn't understand what I watched for a second time.