Caterina Pellegrini is a young Venetian musicologist hired to find the rightful heir to an alleged treasure concealed by a once-famous, but now almost forgotten, baroque composer. Sworn to secrecy, Caterina can solve the mystery only by searching through the papers contained in two chests that have not been opened for centuries.

As she delves into all quarters of his life, she is drawn into one of the most scandalous affairs of the baroque era. What dark secrets do these chests hold, and just whom can she trust?