Riley (Kaitlyn Dias) is a happy, hockey-loving 11-year-old Midwestern girl, but her world turns upside-down when she and her parents move to San Francisco. Riley's emotions -- led by Joy (Amy Poehler) -- try to guide her through this difficult, life-changing event. However, the stress of the move brings Sadness (Phyllis Smith) to the forefront. When Joy and Sadness are inadvertently swept into the far reaches of Riley's mind, the only emotions left in Headquarters are Anger, Fear and Disgust.
Now that Dracula (Adam Sandler) has opened the Hotel Transylvania's doors to humans, things are changing for the better; however, Drac is secretly worried that his half-human grandson, Dennis, isn't showing his vampire side. So, while Mavis and Johnny are away, Drac enlists his friends to help him put the boy through a "monster-in-training" boot camp. But things really get batty when Drac's cantankerous, old-school dad (Mel Brooks) pays an unexpected visit.