For your perusal, the following are links to a conversation happening currently about topic modelling and plotting the plot of a text. Members of the conversation include: Matt Jockers, Ted Underwood, David Bamman, Ben Schmidt, and Lynn Cherney.
Ben Schmidt, "Fundamental plot arcs, seen through multidimensional analysis of thousands of TV and movie scripts," December 16, 2015: http://sappingattention.blogspot.com/2014/12/fundamental-plot-arcs-seen-through.html.
David Mimno, "Where do themes occur in novels?" undated: http://mimno.infosci.cornell.edu/novels/plot.html.
David Bamman's find, and ensuing conversation, January 3, 2015: https://twitter.com/dbamman/status/551440390361194497
Matt Jockers, "Plot Arcs (Schmidt Style)," January 5, 2015: http://www.matthewjockers.net/2015/01/05/plot-arcs-schmidt-style/
Ben Schmidt, "Mimno Clone," undated: http://benschmidt.org/mimnoClone/.