The events in the novel take place at the end of the 20th century in Chile and England. Federica Campione adored her father, although he spent many months away from the family. On one of his visits, he gave her a magic box that once belonged to an Inca princess, and promised that it would bring happiness to her daughter. Fede believed that her father would always be by her side, but her parents separated, and her mother took the six-year-old girl to England. A new country, new friends, first love and first disappointment - all this the heroine has to go through before meeting a wealthy handsome man who becomes her husband. What did this marriage bring to Federica, who found herself in a “golden cage”, who came to her aid in moments of complete despair and what role did the magic box play in this - in Santa Montefiore’s new novel “The Box with a Butterfly”.