In this third title in the Faithgirlz / Glimmer Girls series, the sisters are at it again-looking for a mystery to solve. Back on the road with their famous mom, Maddie, Mia & LuLu are star-struck when they roll into Nashville, Tennessee. The family's pilgrimage to the home of country music coincides with a yearly charity concert at the Grand Ole Opry. Gloria wants her daughters to learn they aren't too young to make a difference, so she gets them involved in her annual benefit and auction. But as things often do with the trio of smart and sassy sisters, they get themselves and their nanny Miss Julia involved in a lot more than just helping Gloria raise money for a worthy and wonderful cause.