Marty has returned from his bizarre trip to 1955 all thanks to Doc's prized invention, the DeLorean time machine. He decides to do some skateboarding around the neighborhood and visits his girlfriend Jennifer. However, this is cut short as Doc arrives from his trip to the future. He tells them that their children's future is at stake and proceeds to take them both to the year 2015. Here, Marty assumes the identity of his son Marty Jr. and faces off with Biff's grandson Griff and then his gang members one-by-one.