When Gelsomina, a naïve young woman, is purchased from her impoverished mother by brutish circus strongman Zampanò to be his wife and partner, she loyally endures her husband's coldness and abuse as they travel the Italian countryside performing together. Soon Zampanò must deal with his jealousy and conflicted feelings about Gelsomina when she finds a kindred spirit in Il Matto, the carefree circus fool, and contemplates leaving Zampanò.

At the beginning of the 1913 Mexican Revolution, greedy bandit Juan Miranda and idealist John H. Mallory, an Irish Republican Army explosives expert on the lam from the British, fall in with a band of revolutionaries plotting to strike a national bank. When it turns out that the government has been using the bank as a hiding place for illegally detained political prisoners -- who are freed by the blast -- Miranda becomes a revolutionary hero against his will.

The epic tale of a class struggle in twentieth century Italy, as seen through the eyes of two childhood friends on opposing sides.