Real-life eccentric heiress Florence Foster Jenkins fancied herself a coloratura soprano - but the exact opposite was true! Despite being called "majestically awful," her concerts in the 1930s and '40s, including a legendary appearance at Carnegie Hall, were not only sold-out but were attended by the creme de la creme of Manhattan society. Told through the eyes of her longtime accompanist Cosme McMoon, Souvenir is a sweet & inspiring and hilarious portrait of a passionate music lover who believed that "what matters most is the music you hear in your head."