Marty and Doc once again embark on a journey of time and space, this time they traveled to 2015, trying to stop the upcoming crisis the McFly family is facing.However, everything was not as smooth as planned - bully Bink Tanen accidentally intervened, and a sports yearbook that shouldn't have appeared also disrupted the timeline.At a critical moment, in order to restore the out-of-control situation, Marty had to return to 1955 and face her young parents again - once again, standing in that familiar and complex past.