In 1838 in the kingdom of Naples and the Two Sicilies, Malacarne, gamekeeper of Baron San Germano, kills the bandit Caruso, whose widow gives birth to Giovanni and at the same time becomes the nurse of Costanza, San Germano’s orphaned daughter. Thirteen years later, Giovanni and Costanza fall in love to the jealousy of her uncle, who shuts her in a convent, ordering Giovanni to be killed by Malacarne who has meanwhile become a bandit. Barely alive, Giovanni is taken away by Bourbon soldiers. After Garibaldi’s arrival in Sicily and its union with Italy, Costanza is freed from the convent and returns to San Germano. She is visited by Giovanni and although still loves him, rejects him since she wishes to become a nun. In the meantime, Giovanni kills Malacarne and takes his place. Costanza marries the rich Lo Turco and the next day departs for Naples, but during the journey the carriage is attacked by Giovanni’s band. Costanza flees with him and they leave for America.

On their way to Monte Carlo, Monaco, Marilyn and her husband, Neil, meet several other married couples, including Julian and Phoebe, who are traveling with a lost dog they plan to return to its wealthy owner for a large reward. But, when the dog's mistress is murdered, the travelers become the prime suspects, and Inspector Bonnard is determined to track them all down.

1849 - Ciceruacchio declares the Independent Republic of Rome, but the French and the Austrians try to bring back the Pope to Rome.