Growing up can be a bumpy road, and it's no exception for Riley, who is uprooted from her Midwest life when her father starts a new job in San Francisco. Like all of us, Riley is guided by her emotions ; Joy, Fear, Anger, Disgust, and Sadness. The emotions live in Headquarters, the control center inside Riley's mind, where they help advise her through everyday life.

For more than a decade, parents Andy and Vicky have been on the run, desperate to hide their daughter Charlie from a shadowy federal agency that wants to harness her unprecedented gift for creating fire into a weapon of mass destruction. Andy has taught Charlie how to defuse her power, which is triggered by anger or pain. But as Charlie turns eleven, the fire becomes harder and harder to control. After an incident reveals the family's location, a...