This roman à clef follows the musical adventures of Consuelo, a gifted singer under the tutelage of the composer Nicola Porpora. After encountering betrayal in her home city of Venice, she goes to stay with a family of nobles in an isolated castle in Bohemia and teach singing to the baroness who lives there. It is there that she meets Count Albert, a troubled young man who experiences regressions to past lives. He is strangely drawn to her, but she, though moved with pity for him, is unsure what to think of him. She then sets out for Vienna to meet with Porpora again and on the way befriends a young Joseph Haydn. The two do their best to skirt intrigue and peril during their journey while Consuelo engages in soul-searching to determine who Count Albert is to her. (Summary by Scarbo)