Marty explores a futuristic Hill Valley and enters the nostalgia-themed Cafe '80s, where he's supposed to meet Griff. Marty meets an elderly Biff and almost runs into Marty Jr., who Griff bullies when he arrives at the cafe. Marty swaps places with his son and confronts Griff, refusing to participate in the robbery. Griff calls Marty "chicken", which triggers Marty and causes a fight between him and Griff's gang. Marty steals a hoverboard and uses it to escape. Griff and his gang try to hurt Marty on their own hoverboards but are knocked off balance, crashing into the courthouse mall at the city center. Griff's gang is arrested and the future changes, with Marty Jr. no longer going to jail. Marty keeps the hoverboard and buys a 2015 sports almanac to take back to 1985, in order to unfairly bet on sports results. Doc finds out and scolds Marty. They try to get back to 1985 but find out that Jennifer has been found by cops and taken to her future home. Doc throws away the almanac, but the elder Biff retrieves it from the trash and steals the DeLorean. Jennifer wakes up in her future home, where she sees older versions of herself and Marty and her future children. She watches as Marty's future self enters a shady business deal and is fired from his job. Doc and Marty intervene in time and bring Jennifer back to the DeLorean, and return to 1985.