Marty McFly accidentally travels back to the time and place that his parents were teenagers. He unwittingly interferes with their first meeting, putting his own existence, as well as those of his siblings, at risk. While working to fix this potential fatal mistake, he learns a great deal about his parents that he never knew, and even has to fend off his mother, who has become infatuated with him. Dr. Emmett Brown, the inventor of time machine, helps Marty solve this crisis while also working to get him back to the future. And as if he didn't have enough on his plate, Marty has time to invent skateboarding and rock and roll.