The backstory:

It all starts in Genoa,Italy ; with a man named Nicollo and his great-aunt Lucrezia ,the current queen of Italy. Nicollo is arranged a coming of age banquet. The night before Lucrezia invited him to a celebration dinner. In the dinner they were served sautéed chicken and mushrooms. What Nicollo didn't know was that the mushrooms he was served were mushrooms with amatoxins ,a deadly poison that can kill you in less than 2 hours. Nicollo , having turned 21 a few days ago , went home to his beloved wife Violetta and his two children. Antonio, who was 2, and his only sister Terra, who had been born only a few months ago. When he had come home he didn't feel so well. He told Violetta " If I die, keep the children till Antonio is 4 then send them to live with my sister in Rome. When Antonio turns 16 give them this envelope." Inside the envelope were two family necklaces. Engraved on them was the letter B which stood for Bonavich , their last name. One was for Antonio and the other was for Terra. Nicollo died a few minutes after doing this.