Out of the blue, private investigator and ex-soldier Lee Arnold receives a visit from an old army mate. Abbas al'Barri worked as a translator with him during the Second Iraq War. Now living in Ilford with his family, Abbas is convinced that he's had a message from his estranged son Fayyaad, who was radicalised and was last thought to be fighting for ISIL in Iraq. Does Fayyaad's message indicate a change of heart? Abbas is desperate for Lee's help in establishing some contact with him, a point with which Lee's Muslim assistant Mumtaz might be able to help.