Riley is a glad, hockey-adoring 11-year-old Midwestern young lady, however her reality flips around when she and her folks move to San Francisco. Riley's feelings is driven by Joy that endeavor to direct her through this troublesome, extraordinary occasion.
The challenge here involves maintaining a believable humanity while also making an entertaining case that humanity is impossible without the proper emotional configuration. And in meeting that challenge, the movie keeps surprising and delighting you.
With originality, lively animation, and some powerful heart-strung moments, it will make you feel the same way as the five emotions in Riley's head, at least for a time (it's mostly Joy, though, by the end).