'Conspiracy' focuses on the clashes, plots and perjuries that characterized seven notorious trials in Irish legal and political history between 1803 and 1916. Each trial shows how the legal system was contaminated by a political agenda and how that political agenda unwittingly incited great moments of legal drama such as the disintegration of the forger, Richard Pigott, under the cross examination of Sir Charles Russell at the Parnell Commission. It delves into the high-profile trials of Robert Emmet, Daniel O'Connell, and the turbulent court martials after the Easter Rising.