Rosemary Murphy and Abie Cohen are the two lovers defined in the title. Their respective fathers and mothers are none too keen on Abie and Rosemary's oil-and-water romance, and get even less keener when the two are married by a Protestant minister, a marriage that is quickly done again by a Jewish rabbi and then again by a Catholic priest. The contrast between Yiddish and Celtic dialects and religious practices is also maintained. Providence lends a helping hand at the end to effect the reconciliation of the fathers to their respective children and the choice they have made.