While her mother is away on business, ten-year-old Oliva is left home alone with her older brother Miles when she witnesses her neighbor's kidnapping. But no one believes her - not her brother, not the cops. So Oliva launches her own investigation, putting her life at risk trying to save her neighbor.

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...