Tim's rich but frugal Uncle Seamus comes for a visit. Obviously he doesn't know of an "Uncle Martin" and is suspicious of Tim's permanent house-guest. Seamus inadvertently sees Martin doing some of his Martian trickery, and comes to the immediate conclusion that Martin is a leprechaun. Seamus isn't going to pass up his chance to get a wish from a leprechaun. All he wants is to find his one true love, Eileen, who he hasn't seen in 25 years and who is living somewhere in America. Martin finds Eileen, a plain housemaid, who doesn't want to see Seamus again since he broke her heart when they originally dated. So Martin transforms her into a refined woman. However she confesses she didn't lose him to another woman, but to the quest for money; she being a poor maid makes her scared that he won't love her for who she is. So Martin physically transforms Seamus into a poor slob. When they meet, he thinks she's rich, and she thinks he's poor. When the truth comes out, their old differences surface. It isn't until he agrees to give up everything for her that true love prevails.
—Huggo