In music, a fugue is a composition which involves interweaving themes that are repeated by different instruments or voices. The word fugue is related to the Latin word fugere, to flee (as in fugitive) and to fugare, to chase; the theme is chased through the different parts of the fugue.
Tolstoy rewrote this parable, which was a favourite of his, in a fuller version as God Sees the Truth But Waits, first published in 1872. The protagonist Ivan Dmitrich Aksionov is wrongly convicted of murder and sent to Siberia, where he later comes into contact with the man who did commit the crime. Read the story online here. Even after his conversion, when he had renounced much of his writing, Tolstoy said that he considered this piece one of his best works.