Big Hero 6 is the story of precocious Hiro Hamada, a kid with a talent for robotics, who teams up with a group of smart scientist kids to fight evil in their city. They are joined by Hiro's brother's invention, Baymax, a super puffy robot whose mission is to maximize the health of those under his care. Baymax's protective instincts and kind "heart" make him ripe for coming to the aid of these young smarties who use their brains and scientific skills to equip themselves to be superheroes.
A particular standout in the cast (as always) is T.J. Miller who voices Fred - the goofy rich kid who gets the symbolism of what they are doing, noting training sequences as comic book references and has a particular glee in what the team is doing to fight crime. He is the comic relief to Hiro's intensity, and he does it brilliantly.