Karmi and Hiro team up to help treat someone overrun with genetically engineered parasites. Big Hero 6 must fight a city being attacked by monsters.
As the new prodigy at San Fransokyo Institute of Technology, Hiro now faces daunting academic challenges and the social trials of being the little man on campus. Off campus, the stakes are raised for the high-tech heroes as they must protect their city from an array of scientifically enhanced villains.