The phrase "plot machinations" refers to the complicated and clever actions or schemes that occur in a story to develop or move forward the plot. Full definition
That the twisty plot machinations of the backstretch actually facilitate the drama, rather than nullifying it, is a testament to what the director has accomplished. (film.avclub.com)
A film of obvious characterizations and even more obvious plot machinations that render its moment - to - moment charms moot. (metacritic.com)
Managed properly, they can yield the most exquisite results; make the series too short, and those well - meaning characters get lost in plot machinations. (hidefninja.com)