A terrorist threat and a serial killer on the streets Edinburgh spell trouble for Scotland's toughest cop. One of the world's most ruthless terrorists is on his way to Edinburgh with only one thing on his mind: the forthcoming conference of world Heads of Government.
If DCC Skinner doesn't pick up his trail fast, he could have a global disaster in his backyard.
While all eyes are focused on the terrorist threat, a terminally ill woman is found dead - an apparent suicide.
But the marks of an assisted death are discovered and this seemingly random death soon proves to be the beginning of an ominous pattern.
For Skinner, the desperate race to find a heartless terrorist mixes uneasily with the search for a mercy killer- a search which takes on a poignant personal significance...