This taut thriller follows police officer David Budd, stunningly portrayed by Richard Madden. DS Budd is a war veteran, barely holding his life and psyche together, always on alert, suffering from PTSD. He is also very, very good at his job protecting dignitaries. When he distinguishes himself by thwarting a bombing, he is promoted to protect the Home Secretary, a hawkish politician. The characters are complex and multi-dimensional and the action thrilling and suspenseful.