In Dublin, Ireland, Danny O'Neill attends Casey's Police School in hopes of becoming a member of the New York City police department. He arrives in America on St. Patrick's Day and takes part in the city's parade (footage of an actual parade is inserted here). At a local police precinct, he discovers that his diploma from the Irish police school is worthless. However, his singing voice gets him a job offer he wasn't expecting.
Dublin in Brass
A singing Irishman graduates from a cheesy Police School and heads to New York City to join the force, leaving behind his fiancée.