Marty McFly and his best friend are thrown back into the '50s when an experiment by his eccentric scientist friend Doc Brown goes awry. Traveling through time in a modified DeLorean car, Marty and his friend encounters young versions of both their parents, and must make sure that they fall in love or they'll cease to exist. Even more dauntingly, Marty and his friend has to return to his own time and save the life of Doc Brown.