A young robotics genius named Hiro (Potter) develops an emotional bond with a rather portly, inflatable medical-care robot (that his brother put together) named Baymax.
When his brother dies in an accident, Hiro suspects foul play and enlists the help of his robot buddy and his brother's friends to get to the bottom of things.
Big Hero 6 attempts to breathe cinematic life into a group of lesser-known Marvel characters, and most definitely succeeds in doing so. The action takes place in San Fransokyo (a combination of San Fransisco and Tokyo) - a city that blends the Occident and the Orient in a visually pleasing and quirky manner.
Much to the chagrin of disciplined elder brother Tadashi (Henney), 14-year-old Hiro likes to fritter away his time and talent by frequenting illegal robot-fight dens with his innocuous-looking (but actually deadly) microbot to defeat the competition and make wads of easy prize money.
When Tadashi (also a robotics whiz) takes Hiro for a whirl at his college lab, Hiro is massively impressed. Some time later, his microbot invention (he needs to invent something really cool to get admission, regardless of his young age) impresses the robotics head of San Fransokyo Institute of Technology, Professor Callaghan (Cromwell) enough for the latter to offer him admission.
After the aforementioned tragedy, Hiro is grief-stricken and goes into revenge mode. Baymax, Wasabi, Honey Lemon, GoGo Tomago and Fredzilla (Adsit, Wayans, Rodriguez, Chung and Miller, respectively) train themselves superhero-style for the showdown with the villain. Somewhere down the line though, Hiro realizes that blind rage will not bring his brother back to life. Although the identity of the villain can easily be guessed, the narrative itself moves along briskly and the animations are detailed, smooth and thankfully not over-saturated.
Big Hero 6 also provides many moments of genuine sweetness. Furthermore, as apart from other superhero fare, the most powerful weapons in the arsenal are that of kindness, compassion and - as is the case with Baymax - healing. Definitely a delightful film with its heart in the right place.