Marty made it back to the future but that is far from the end of the story. Once he arrives home, all that he knew at the beginning of the last movie has changed. Now his future is in jeopardy, Doc has come back from the future to take them further into the future. They are about to face what their future holds. The thing is, they must avoid themselves at all costs. So what is it they are there to do... will they do it and will they find a way back. All of that and more will be answered in this second installment of the movie. That's not all there is to the story though, in order to fix the future, they must go back to the past to restore the present in order to have a future. It's only when an unfortunate event occurs that you'll be left wondering how will this play out as there are many unanswered questions left at the end of this story. It plays into the idea of a third installment but how they'll go further into this story with the cliffhangers at the end of this one is yet to be seen. Though this doesn't have the continuity of the first one, it has a charm all of its own and only when we get to that time in the future will we see how much (if any) of it they got right. That's the beauty of sci-fi though, it's imagination that will shape tomorrow. Come along for the ride and hang on... I have a feeling this story isn't done yet.