David Threlfall stars as Tom Rowse, a retired British secret service agent turned thriller novelist who is brought back into the world of espionage for one last job. The mission - foiling a Libyan plot to supply the IRA with a massive shipment of high-tech weapons in order to wreak revenge upon the UK for their support and co-operation with the US during the 1986 bombing of Libya and the attempted assassination of Colonel Gaddafi .