Over the weekend at the D23 Expo, Pixar discussed details, showed footage and introduced the cast of their new project Inside Out.

Directed by Up and Monster’s Inc. director Pete Docter, Inside Out follows 11-year old girl Riley, who has to move from Minnesota to San Francisco with her family, just as she’s hitting the onset of puberty. However, what sounds like a seemingly simple concept is more complex. While Riley is the protagonist of the film, according to the materials released, she’s also the setting. It seems that much of the action of the film will take place inside Riley’s head while she’s struggling with growing up.  

Just like with Brave being inspired by Brenda Chapman’s daughter, Inside Out is inspired by Pete Docter’s daughter.  Clearly, this is an opportunity for Pixar to deal with some girl centric issues of puberty like getting her period.  Hopefully they won’t chicken out on that important piece of girls adolescence.

The main characters, aside from Riley, are the emotions in her head–Anger, Disgust, Fear, Joy and Sadness (some of whom are voiced by funny ladies, Amy Poehler and Mindy Kaling). The emotions control Riley’s actions, compete for complete control of her brain and store her memories.

The D23 audience was shown how the film will show both Riley’s external and internal reactions. The rough footage shown looked at a dinner table fight–going back and forth from the action at the table and the internal conversations that Riley and her parents are having. The film will also visualize certain types of thoughts in the brain as places–for example, “abstract thought” looks like a Picasso painting.

This could be really revolutionary.  Inside Out will hit theaters on June 19, 2015.