This is the story of Detective Sergeant Rebecca Castle and her struggle to stop terrorists from destroying the Eurostar, the Channel Tunnel and the Royal Train, as she discovers the high cost of promotion along the way. From the battle ground of Basra to the Tunnel in Kent, with the aid of the SAS and MI5 this tale takes her through the bloody extermination of soldiers, the kidnap of her husband and the power of having the whole resources of the UK in her hands to stop Abdullah Razzac Fakesh from achieving his goal.