Summer vacation is almost over and the new semester is coming fast. Hiro Hamada is excited about starting his sophomore year at SFIT, but he knows he has to face new challenges. Gogo, Honey Lemon, and Wasabi are still job hunting, Fred has been coming up with new ways to keep Big Hero 6 together, and they need a plan to balance their already busy schedules. Not to mention, Hiro is struggling to tell his aunt about his double life at the right time. Meanwhile, new villains are causing panic in the city of San Fransokyo with a mysterious plan. Can Big Hero 6 stop this devious peril?