As described in a review in a film magazine, Tom Donahue (Meighan), a Fifth Avenue traffic policeman from New York City, wins a trip to Ireland in a newspaper contest. He looks like Lord Fitzhugh, nephew of a nobleman who has cut him out of his will in favor of his cousine. On his deathbed, the Earl (Lawford) longs to make up with Fitzhugh. Fitzhugh's sister Gwendolyn (Wilson) meets Tom and takes him back to Killarney with her and, when Fitzhugh fails to appear, persuades Tom to impersonate him and gains the fortune. Eventually, Tom frees Fitzhugh, who had been lured to Killarney, and wins the love of the young woman.