He was Russia"s greatest playwright. She was the leading actress in the Moscow Art Theater. But they were more than artistic collaborators. From 1899 until his death in 1904, Anton Chekhov and Olga Knipper were friends, lovers and, finally, husband and wife. But her work and his health caused them long separations. Revealed through their letters, this was one of the most extraordinary love stories in the history of theater.