From a small Irish town where everybody knows them, two guys try for a better life in New York City. It's hard to leave the land where your ancestors are buried; your family and friends are left behind. Still, trying to make a living in not only a new city, but a new land, is even harder. Finding work takes time; finding friends takes longer. They get by with help with those who came earlier. And then help others when they get established. The lesson is: wanting more is fine, getting greedy is not.
See also: In America for a film about immigrating to in NYC.