A mystery set in a small town in Virginia, Secret of Belle Meadow features thirteen-year-old Tina and her friend Karin, whose family has owned Belle Meadow, an old farm plantation, for generations. Belle Meadow has been turned into a bed-and-breakfast inn, and somewhat reluctantly Tina is working there for the summer. When Tina's stepsister Anne comes to stay for the season, Tina is initially unhappy with the prospect of the visit, but during the course of the summer, she learns to appreciate Anne's unique gifts. While cleaning at Belle Meadow, Tina finds an old diary that hints of valuables hidden at the plantation during the Revolutionary War. She, Karin, and Anne are determined to find the treasure. Their search teaches them about genealogy, antiques, and local history as well as a bit of archaeology. The excitement mounts as they draw closer and closer to making a fascinating discovery.