Marty and Doc are back at it in this ridiculous sequel to the 1985 hit as they go back in time to 2015 to help the McFly family with some issues. But there are issues with Biff Tannen, a bully, and an annoying sports almanac. When Marty runs into his parents again as a little child, he decides to go back in time to 1955 in an effort to put things right.