TV comedy starring Frankie Howerd as a valet to the legendary lover, Giacomo Casanova. Casanova (Stuart Damon)'s exploits have landed him in trouble with one of the most powerful men in Italy, the ruler of Venice, and he is on the run. Aware that his life is potentially in peril, Casanova proposes to his valet, Francisco (Howerd), that they switch identities. Francisco suddenly finds himself elevated to a status in life he could never have anticipated. But will he discover that life as Italy's most famed lover has its pitfalls as well?