Marty McFly is an ordinary teenager whose life changes dramatically after he accidentally travels to the year 1955 in a time machine created by his friend, the eccentric scientist Dr. Emmett Brown. In the past, Marty meets his teenage parents and accidentally interferes with their first meeting—putting his own existence at risk. Now Marty must fix the course of events by convincing his parents to fall in love with each other, otherwise he’ll never be born. Together with young Dr. Brown, they fight against the flow of time and the dangers of the past to get Marty home before the future changes forever.