"Secret State" is a four-part political thriller inspired by Chris Mullin's novel "A Very British Coup", delving into the relationship between a democratically elected government, the military and the markets. In the run up to a general election, an accident on Teesside raises awkward questions about the safety procedures of a US petrochemical company, PetroFex. The Prime Minister claims to have secured a compensation package from them, but on his return from PetroFex HQ, his plane crashes in the Atlantic under mysterious circumstances. Deputy Prime Minister Tom Dawkins (Gabriel Byrne) takes the reins and during his quest to find justice and the truth for the victims on Teesside, he uncovers a conspiracy at the heart of the political system. How will he deal with the powers at play? And can he remain that rare thing: a decent, honest man in politics?