complot

COMPLOT, n. A plotting together; a joint plot; a plot; a confederacy in some evil design; a conspiracy.

I know their complot is to have my life.

COMPLOT, v.t. To plot together; to conspire; to form a plot; to join in a secret design, generally criminal.

We find them complotting together, and contriving a new scene of miseries to the Trojans.