The villagers of Ploverleigh are celebrating the marriage of Alexis, son of Sir Marmaduke Poindextre, to Aline, daughter of Lady Sangazure, who just happens to be Sir Marmaduke's old flame. Alexis is determined that all shall share the purity of his true love. He has arranged for Mr. Wells, "a dealer in magic and spells," to administer his best-selling love potion to everyone in the village, including the vicar Dr. Daly. The result is hilarious confusion.

A couple of happy-go-lucky Venetian gondoliers discover that one of them is heir to the throne of a distant kingdom.

Princess Ida and Prince Hilarion were betrothed when the Prince was two years old and the Princess just one year old. Twenty years have now passed, and the time has come for Hilarion to claim his bride. The Princess, however, has other ideas. She has set up a women's-only University - and men are not allowed. Hilarion and his friends, Cyril and Florian, disguise themselves as women to gain entrance to the University. All goes well until Cyril's unmaidenly conduct compromises their disguise - and reveals the three friends as intruding men.