The Italian city of Naples, devastated by World War II, lies in ruins; orphaned children Carmine and Celestina survive life in the rubble-strewn streets by helping each other. Like so many others, they dream of going to America, where Celestina’s sister went two years earlier. One night, they stow away on a ship with an eccentric captain bound for New York, where they join hordes of Italian emigrants hoping for a better life in this strange new country.