follows Hiro Hamada, a 14-year-old robotics prodigy in the futuristic city of San Fransokyo, who overcomes the grief of losing his brother, Tadashi, in a suspicious fire. Alongside Tadashi's healthcare robot, Baymax, and a group of friends, Hiro uncovers a conspiracy involving a masked villain who stole his invention, the microbots, and formed a high-tech team to stop him.