After discovering what they believed to be a German plot to invade The Isle of Sheppey (their main piece of evidence ultimately turned out to be a child's treasure map), policemen Ernest Ridley and Arthur Smyth are asked to join the new Secret Service in London: an organisation dedicated to uncovering foreign spies and plots in the uncertain and paranoid years before the Great War.

Set in 1909, the two men have been friends since childhood and served together in the British Army in India. Although they bicker a lot of the time like an old married couple, they are inseparable they live together in the same boarding house, and share the same love of King and Country. If only they were a little better at their jobs...

This comedy was due to be broadcast on Radio 4 on the 17th November 2015, but the broadcast was pulled at the last minute due to the Paris terror attacks. It was eventually broadcast in February 2016.