Poppy, daughter of carnival medicine salesman Professor McGargle, falls in love with the Mayor's son. Countess Maggie Tubbs DePuizzi is claimant to the Putnam estates, but McGargle and lawyer Wiffen plot to make Poppy claim the fortune. Wiffen and the Countess double-cross the Professor, but kindly Sarah Tucker notices a resemble between Poppy and the deceased Mrs. Putnam. It turns out that McGargle adopted the girl, she is the rightful heir, the purported Countess is only a showgirl, and every one has a happy ending.