Why does Olivia Dobson, having found herself as a relative in the magnificent estate of Italian millionaires, try to flee from there in panic? What kind of evil fate hangs over the powerful Mazini clan? What does the ring with a huge square diamond, left in a secluded place, given to Miss Dobson on the day of her engagement by her mysterious groom, mean? Life is generous with riddles, but solving them is not so easy, especially when love rules over reason. But she also saves those who trust her from mistakes...