Marty and Chris McFly along with their friend Doc Brown travel forward through time to the year 2015, where they must save their children from an event that would destroy both of their families, while they're in the future, their enemy Biff Tannen steals the time machine and changes the past for his own personal gain, now they must travel back to the past in order to repair their future

17 year old Marty McFly and his 13 year old brother Chris were normal 1980's kids until on October 26th 1985 they come across a Delorean Time Machine invented by their friend Doc Brown, and travel back in time to 1955 and accidentally prevent their parents meeting, now they have to find a way to get their parents together to assure their existence and get Back to the Future