On Fylingdales Moor the 'Pyramid' of GCHQ can clearly be seen from the road, so it was inevitable that a terrorist attack, on the security of both the UK and the USA, would be attempted. A disastrous situation can only be averted by the accidental intervention of Tina Whitely and Harry Mortimer.The North Yorkshire Moors is a place of repose, or so it appears, but the moors held a secret, which time had eroded and which was discovered only by pure chance when Tina and Harry tumbled down the Spike.