The Mysteries of Detective Tivo

An eleven-year-old orphan girl, Tivo, lives alone and supports herself by being a private investigator. Her father, an Italian who was the head detective of the Direzione Investigativa Antimafia (DIA), and her mother, an American, were both rumored to have died in a fire back in Italy while Tivo was visiting her American grandmother in the United States. Her grandmother died of a stroke shortly after, leaving little Tivo all alone and making her have to fend for herself.
Years later, a mysterious note made its way to Tivo, stating that her parents were actually still alive!
Who sent this note? Could it really be true? Are her parents really alive? If so, will Tivo be able to solve the mysteries that lie before her and reunite with her parents once again?
One thing's for sure though... There's no mystery too big or small for the great Detective Tivo!