John Worthing, a charming and carefree young man, leads a double life that revolves around his fabricated brother named Ernest. In the countryside, John appears as a respectable gentleman, but whenever he visits London, he adopts the persona of his mischievous alter ego, Ernest, which allows him to indulge in adventures and social freedoms he's otherwise restricted from. His close friend, Algernon Moncrieff https://www.whatsafterthemovie.com/actor/michael-denison], shares his playful spirit and also enjoys bending the rules of society, often engaging in witty schemes.
While in London, John falls deeply in love with Gwendolen Fairfax [ttps://www.whatsafterthemovie.com/actor/joan-greenwood], Algernon's cousin. Gwendolen is captivated by the name Ernest, and she confesses that she could only marry a man with that name, believing it embodies a certain charm and integrity. Eager to propose, John faces a significant obstacle when her formidable mother, Lady Bracknell [htps://www.whatsafterthemovie.com/actor/edith-evans], questions his background. When John reveals that he was found as a baby in a handbag at Victoria Station, Lady Bracknell is highly disapproving, demanding that he prove he comes from a respectable family with a proper lineage before she considers the marriage.
Back at his country estate, John lives with his young ward, Cecily Cardew [htps://www.whatsafterthemovie.com/actor/dorothy-tutin], and her governess, Miss Prism. Algernon, curious about John’s story and intrigued by the idea of having an imaginary brother named Ernest, decides to visit John's estate under the false pretenses of being his brother. During this visit, Algernon encounters Cecily, who is secretly enamored with the mysterious "Ernest"—a character she has heard about in John's tales. Algernon, adopting the role of Ernest himself, quickly falls for Cecily, and she, in turn, soon becomes smitten with him, believing he is her ideal match.
Things become increasingly complicated when Gwendolen arrives at John's country home and soon meets Cecily. Both women, each committed to their respective "Ernest," realize they are engaged to men they believe are named Ernest. This sparks a flurry of mistaken identities and humorous misunderstandings. Matters are further intensified by the arrival of Lady Bracknell, who is determined to scrutinize her daughter’s fiancé. Amidst the chaos, it is revealed that Miss Prism, the governess, was the nurse who, 34 years earlier, accidentally misplaced a baby at Victoria Station—who, as it turns out, was none other than John himself.
This revelation uncovers that John is the long-lost younger brother of Algernon and genuinely the man Gwendolen would marry if all obstacles were removed. Interestingly, John has been pretending that his name is actually Ernest, a fact that Lady Bracknell, after some hesitation, accepts as his true name. The story culminates with joyful unions, as both couples—John with Gwendolen, and Algernon with Cecily—find happiness after all the comic confusions and mistaken identities are resolved. The play humorously underscores the importance of identity, social appearances, and the idea that sometimes, being true to oneself is the greatest adventure of all.