Project Skydancer; the brainchild of the Ministry of Defence and terrifying in its simplicity. New warheads had been designed that could evade the batteries of anti-ballistic missiles the Russians had set up around Moscow. For Aldermaston scientist Peter Joyce, it was the pinnacle of his career. Until documents from the project turn up on Parliament Hill and he is left with two alternatives: write off a billion-pound project, or approve tests which could give Russia the power to wipe out the West at a touch of a button.