Desperate to prove himself to his politician father, Esmond Lowndes is sent to Italy to forge ties between the British Union of Fascists and Mussolini's government. In Florence, he discovers art and passion amongst the eccentric expatriates and glamorous locals. But with the coming of war, Esmond chooses to leave his past behind and joins the Florentine resistance. Finding himself closely bound to his comrades and unexpectedly in love, Esmond becomes involved in undercover operations and assassination plots, culminating in a final mission of extraordinary daring.