afoot
a plot is afoot

assassinate
a plot to assassinate the President

garden
garden plot

grass
grass plat / grass plot

ground
ground plot

gunpowder
the Gunpowder Plot

hatch
to hatch a plot

knit up
to knit up a plot

plot
to lay a plot

seed
seed plot

thicken
the plot thickens

uncover
the plot was uncovered by the police

weave
to weave a plot