Nanki Poo is the son of the Mikado. He has disguised himself as a wandering minstrel to be near the village girl he loves Yum Yum. Their love is complicated by an old woman named Katisha who believes she will marry Nanki Poo. In the end, Nanki Poo and Yum Yum are united. Katisha settles for Koko, the town's executioner.