His world shaken by a terrorist attack, and his best friend critical in hospital, teacher and part-time spy, Augustus Fox, is once again called upon by MI5 to discover who was behind the blast and just what, or who, their next target will be.
To make things worse, his autistic brother, Larson, is struggling to cope with real life, and a face from Gus' past has returned to haunt him.
When an extreme right wing political party tries to recruit him, will Gus succumb to the charisma of their leader, Thomas Wareing? Or will he continue blindly down the path of being the best man he can be?