"Knowing your enemy is not the primary consideration. You have to know what you are defending first of all. Then the enemy will show itself" Oliver Maitland joined MI5 to defend his country. To defend freedom and democracy. He's served his time in the hell of Northern Ireland, battling for a peaceful solution. Now he's transferred to counter-subversion, fighting not the IRA but ordinary men and women. Phone tapping, mail interception, burglary - it's a dirty war. And when Maitland finds out the truth behind the Mountbatten murder he begins to wonder who the enemy really is. Operation JUNIPER, brainchild of Maitland's sadistic boss, "Butcher", is the deadliest campaign yet. It's going to smash the peace movement and sabotage disarmament talks. Maitland knows The Butcher doesn't care how many British agents have to die to fulfil his plans. What he doesn't know is that he's top of the hit-list ...