There’s nothing 15-year-old Holly Adams loves more than a good mystery. So she sets up The Mystery Club to meet people who share her interest. But only two people want to join - energetic Tracy Foster and carefree Belinda Hayes. The three girls couldn’t be more different, but they quickly become best friends. And when they stumble on the clues to a lost fortune, suddenly The Mystery Club is involved in an adventure that’s only too real. Before they know it, they’re on a roller-coaster of mystery, danger and suspense!