“He who seeks vengeance must dig two graves: one for his enemy and one for himself.”

In the Middle East, refugees fleeing dictatorship and terrorism pour across the borders into Europe, destabilizing countries already in the throes of economic crisis. But not all who seek refuge share the same reasons for so doing.... In the UK, the nationalist far right gathers strength - fueled by a government unable or unwilling to protect its own. England is on the brink. All it will take to send it tumbling into the abyss...is a single push. And in the midst of it all, two men have arrived in London, dark harbingers of death to come. One of them is a terrorist, responsible for one of the most successful attacks against the West in the years since 9/11. The other, an assassin, come to take his life.

Fifteen years Harry Nichols spent as a CIA paramilitary operations officer. Fifteen long years of war, tracking America’s enemies across the world. Hunting them down - killing them. Before they could strike. Until the Christmas Eve attacks on Las Vegas forced him to resign from the agency. Attacks which killed hundreds of innocent Americans, claimed the life of the woman he had sworn to protect. The woman he loved. Forced out into the cold, Nichols has found himself in the UK, operating without sanction, without law. A man without a country - come to London with a single purpose: kill the man responsible for the attacks in Vegas. Avenge her death. No matter what it takes. What lines must be crossed. What faiths must be betrayed. There are no rules, not any more. Only vengeance. His career with the CIA is over. His war...has only just begun.