Phyllis Clark and the Devil's Scepter

Phyllis Clark just finished her junior year of high school, and more than anything else she wants to become a private detective like her grandfather. In hopes of changing her mind, her parents send her to visit her uncle who works for the California historical commission. Phyllis, her uncle and his handsome young assistant find an old pirate map which eventually leads them to the devil's scepter. The scepter is also sought by an artifacts dealer, and a demon, each of whom are more than willing to kill for them.