The Dark Hills Divide introduces readers to Alexa Daley, who annually visits the town of Bridewell. Alexa is curious about what lies beyond the massive ramparts that surround the city and the walled roads that link Bridewell to nearby towns; soon after town leader Thomas Warvold passes away, Alexa finds herself outside the walls, acquires a stone with remarkable powers, and discovers that she's meant to stop a potential war from occurring.