When a firebomb attack at a Brighton travellers' site kills women and children, Chief Superintendent Jo Howe has strong reason to believe the new, dubiously elected, far-right council leader is behind the murders.

Against the direct orders of her chief constable, Jo digs deeper into the killings. She uncovers a criminal ring of human trafficking and euthanasia all leading to a devastating plot which threatens thousands of lives and from which the murderous politician looks sure to walk away scot-free.