The first night Mandie is at the White House she hears something in the hallway and is convinced that she sees George Washington-- who's been dead for 200 years! In the nights that follow, she sees him again in different places. What's going on?
Mandie studies an old treasure map that has mysterious markings. When she and her friends search for the treasure, they receive threats from an angry man.
When Mandie and her friends board an express train for Rome, she spots the vanishing women who has been following them. She decides to find out who the woman is and what she wants.
While thirteen-year-old Mandie, her friend Celia, and her grandmother visit Senator Morton in his home in St. Augustine, Florida, in 1902, the girls uncover a series of secret plots.
Mandy is bewildered by the unhappy reaction of some of her Cherokee friends to her discovery of gold inside a cave and her Christian values are tested by a troublesome Cherokee cousin.
Mandie and her best friend return to the attic to investigate the mysterious old trunk and discover a set of old letters which include some important and exciting information.
Mandie goes to visit Joe Woodard in Swain County, North Carolina, where she and her father used to live. When Mandie and Joe visit the old cabin where Mandie lived, they find that someone is hiding out there.
While on spring break from her girls' school in North Carolina in 1902, fourteen-year-old Mandie joins her college friend Joe in solving a mystery in the nearby mountains.
Mandie and her friends have donated the gold they discovered to build a new hospital, but someone or something is tearing the walls down as fast as they can be built.