Marty and Doc must head 30 years into the future to save Marty's kids from calamity,l but end up making a mess of the past when Biff Tannen takes over the DeLorean.  Will they save themselves, and their pasts, as well as their futures?

This ingenious sequel takes the premise of the original film for a loop-de-loop of logic few were expecting it to go, from the minds of Robert Zemeckis and Bob Gale.