A group of people from different backgrounds have one thing in common: when they hear the world "gumball" whispered by one of the others, they know that it's time for the Gumball Rally: a no-holds barred, secret, winner-take-all rally across the USA.

A Russian emigre prides himself on the way he's molded himself into a real Yankee in the USA, though the world he lives in, New York's Lower East Side in the late 19th century, is almost exclusively populated by other Jewish immigrants. When his wife finally arrives in the New World, however, she has a lot of assimilating to do.

New York City English professor Axel Freed outwardly seems like an upstanding citizen. But privately Freed is in the clutches of a severe gambling addiction that threatens to destroy him.

The story concerns the difficulties and reactions of Maddalena (Sophia Loren), an Italian visitor to New York City. She has come to the country carrying a huge mortadella sausage which she intends as a gift for her fiancé. But Customs do not allow processed meat to enter the U.S., so she is held at JFK airport...