Bill Wiley has seen action - some of it open, much of it covert - in many of the world's most dangerous places. In his country's name, he has brought lives to an end, rarely expecting to understand the reasoning behind his orders. But when he is called back from Northern Ireland for his latest assignment, his growing realisation of the toll the years have taken is finally crystallised. For the man his paymasters want him to kill is ninety-three years...