"In a remote Scottish cottage, two men and two women die from gunshot wounds. Police believe one killed the other three before committing suicide. One of the four worked undercover for the Lambeth Group, and his team leader is missing. To find out what happened, a second team will follow the bread crumbs. Led by Zoe Tampsin, they expose a terrorist group operating in plain sight. An attack is imminent. It will destroy the special relationship between the UK and the USA. Zoe and her team prepare to stop them. Unaware of a deep-seated traitor, determined to stop her at any cost."