Casanova longed for books during imprisonment; now, as an old man, he is surrounded by them. Aged 73, he works as a librarian in a German castle, although disquieting rumours have reached the ears of tyrannical major-domo Herr Feldkirchner about the whereabouts of Casanova's hand in relation to the cook's skirts. Plagued by a heart ailment, Casanova struggles to put to text form the memories of his life, including his triumphant prison escape.