discover a conspiracy
discover a plot

Now, my father says, he has recently discovered a plot to take your life so that Peter may become king.

Christine discovered the plot the day before her husband's death.

I cried before he could discover my plot against him.

They escape from Manhattan just ahead of police, who have also discovered the "plot".

Perhaps he had discovered a plot against his life.

Like telling a story where you never discover the plot but only feel what the protagonists felt.

Just hope to hell it's not too much time for the Chinks to discover the plot.

"Grateful that I discovered the plot by use of my cursed powers?"

And to do this would be to advise Andromeda that we have discovered its plot.

During the mission he discovers a communist Chinese plot to cause an international incident.