In an elegant palazzo on the Grand Canal, an American ambassador’s tryst turns deadly. In the seedy underbelly of London, a pub-crawling killer is on the loose. And in a storybook chapel nestled in the Cotswolds, a marriage made in heaven turns to hell on earth. Isolated incidents? Or links in a chain of events hurtling towards catastrophe?

A shadowy figure known as the Dog is believed to be the ruthless terrorist who is systematically and savagely assassinating American diplomats around the globe. As the deadly number increases, Alexander Hawke and Navy SEAL Stokely Jones are asked by the United States government to track him down. From London to the Florida Keys to a remote Indonesian island, Hawke and Jones are on a breakneck race to stop a bloodthirsty psychopath with plans to throw the United States into cataclysmic ruin.