The Great War has just ended. In New York City, streetcar conductor Dennis O'Grady, a stubborn Irishman, long ago turned his back on his former vaudeville life in believing that life of upwards of twenty shows a week killed his partner and wife, Rosie O'Grady, fondly remembered by anyone old enough to have seen her on the stage. He is not naive enough not to know that his three marriageable age daughters, Kathleen, Patricia and Maureen, will attract the eyes of the plethora of returning servicemen in matrimony. However, only he will make the choice of who is suitable for them, he solely looking for nice Irish boys with prospects. What he is unaware of is that Katie is already married to Jim Moore, a police officer, they who wedded before he was shipped to Cuba for service. They don't plan to tell her father about the marriage until Jim is able to arrange for a suitable home for the two of them, and the three and four of them in nine months' time. What Dennis is also unaware of is that Pat aspires to follow in her mother's footsteps in a life on the stage, she and Tony Pastor having fallen for each other in the process, he, not only not Irish, but a singer with his own family-friendly revue. A happy ending for Pat and Tony is not only threatened by her father's certain non-approval, but the combination of Tony wanting to do right by all the O'Gradys, and his mistaken belief that she has eyes for someone else, namely her dance partner and his friend, Doug Martin.
—Huggo