Plot is usually set in motion by some sort of conflict or crisis.
instigator
A catalyst is something or someone who sets things into motion.
The answer follows this set.
Conspiracy the plot was set up by Robert Cecil
you can show motion by distance against time
Cassius Longinus started the plot against the dictator, quickly getting his brother-in-law Marcus Brutus to join.
A plot is an area of land set aside for some purpose (building a house, growing vegetables, etc). A Garden Plot is therefore a piece of land set out as a flower garden.
Set My Love in Motion was created on 1981-07-02.
Can I file a motion to set aside a dismissal on a unlawful detainer
The three factors that set convection currents in motion are: the heating and cooling of fluid, change in its density, and the force of gravity combine to set it in motion.
The inciting incident is the event that starts the main action of a story and sets the plot in motion.
The inciting incident is the event that triggers the main conflict of the story and sets the plot in motion.