Endgame with a Diamond Knight

The betrayal of her fiancé and friend forces Aksinya to leave the capital, abandon her business, and return to her hometown. But there, she awaits another bitter surprise: her father, to whom she is going, has settled the family of his mistress in their home, and there is no place for her. She leaves. On the same day, her father dies, and Aksinya discovers among her belongings a chess knight figurine adorned with precious stones and gold, which she has never seen before.