Definitions:
" land in the form of a plot or plots; the area or value of such land, especially when aggregated from smaller plots.

the increase in the value of a formerly subdivided piece of land resulting from its amalgamation under a single ownership; the value of such an increase (in full ""plottage increment"").

the plotting of a play, film, etc. only in ""a mess of plottage"": a convoluted or poorly constructed dramatic plot; a play with such a plot.

"