No one has seen heads or tails of Dr. Emmett Brown in months. Marty McFly, normal 80s teen, is worried about his friend, and so is Emma Brown, The Doc's granddaughter from the year 2016. After failing to stop an estate sale from happening, the two teens have almost given up hope completely until the DeLorean mysteriously appears, driverless, in the driveway outside Doc's garage.