Set in and around the corridors of power, Bodyguard tells the fictional story of David Budd, a heroic but volatile war veteran now working as a Specialist Protection Officer for the Royalty and Specialist Protection Branch of London's Metropolitan Police Service. When he is assigned to protect the ambitious and powerful Home Secretary Julia Montague, whose politics stand for everything he despises, Budd finds himself torn between his duty and beliefs. Responsible for her safety, is he actually her biggest threat?