Nega-Globby begins to take control of Globby's body to cause chaos around the city, turning Globby from an adored hero to a wanted criminal overnight.

When Hiro finds a wrapped present in the closet, he assumes it's from Aunt Cass and takes it in order to figure out what it is. However, after a mix-up, the present becomes lost and Hiro enlists the Big Hero 6 team to track it down.