"The Lady with the Dog" is a short story by Anton Chekhov. First published in 1899, it describes an adulterous affair between an unhappily married Moscow banker and a young married woman that begins while both are vacationing alone in Yalta. It is one of Chekhov's most famous pieces of short fiction, and Vladimir Nabokov considered it to be one of the greatest short stories ever written. (Wikipedia, CC BY-SA 4.0)