Back to the Future Part II travels back to 1985 just after Marty McFly has begun to settle back to his life. His scientist friend Dr. Emmett Brown appears in his driveway in the modified DeLorean time machine warning Marty and his girlfriend Jennifer that they must travel to 2015 to protect his children from trouble. Marty reluctantly agrees and they join Doc. Upon taking off Marty's enemy Biff Tannen spots the time machine. When they arrive, Doc incapacitates Jennifer to keep her safe.
Marty goes through culture shock upon being exposed to the future's technological advancements. Everything looks like its 1985 counterpart but has a shiny sci-fi veneer he once could only dream of through comic books. The two track down Marty's son and force Marty to face his fear of bullies again. This time he has to defend himself against Griff Tannen, the grandson of his family's nemesis. He gathers his courage and strikes down the deal his son was due to make with Griff's gang causing the punks to give chase. Marty uses his wits to outsmart them and gets them arrested after crashing into the courthouse.
Marty celebrates by purchasing a Sports Almanac to cheat on bets but Doc Brown chastises him and attempts to dispose of the magazine. Trouble strikes as cops discover Jennifer unconscious and return her to the address she lives at in 2015. Biff, now an old man, spots the DeLorean and uses a cab to follow them with the Almanac in hand. He hijacks the DeLorean while the two time travelers are distracted and gives his 1955 self the Almanac and then returns the DeLorean. Doc and Marty retrieve Jennifer and return to 1985 only to discover that Biff has grown wealthy and taken over the town. Marty must own up to his mistake and track down the Almanac to 1955 to prevent Biff's rise to power all while evading the events of his previous visit!
Want to get around town like Marty McFly? Come this Christmas, you may find yourself to be the proud owner of a new Mattel hoverboard, just like the one that Marty used in "Back to the Future Part II." Check it out!