As a young child, Frederic had been apprenticed to a pirate by mistake when he should have been apprenticed to a pilot. Now, having reached his 21st year, Frederic's indentures are at last over and he happily leaves the service of the pirates. When Frederic meets the beautiful Mabel, one of the many daughters (or wards in Chancery) of Major-General Stanley, they fall in love and decide to marry. However, complications arise when the pirates decide to marry the rest of the Major-General's daughters, themselves - and Frederic's birthdate turns out to be not all it seems.
Strephon, a shepherd (the son of a Fairy, Iolanthe, and a mortal), is in love with Phyllis, a shepherdess. He wants to marry her, but, although Phyllis also loves Strephon, she has a dilemma - she is so beautiful that all of the House of Lords, as well as her guardian, the Lord Chancellor, are also desirous of marrying her. There are many complications - including the peers being threatened by the Fairies - before a happy conclusion is reached by all.
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.