The Baby-sitters think the Cat Burglar is on the loose in Stoneybrook when a cache of diamonds disappears. But other clues point to different conclusions, and the police take a very surprising suspect into custody. Now it's up to the Baby-sitters to sort out the real clues from the fakes.

For as long as she can remember, Nadia and her younger brother, Chris, have been tagging along with their parents as they travel the world searching for the untold stories of ancient societies, including the Kamju, a civilization hidden deep in the wilds of Uganda. Nadia knows how important this discovery could be to her parents, but she can't shake the feeling that something is wrong. After all, wouldn't there be more than legends and whispers of...