When Grover Langhorn is arrested by London police he claims that if he is extradited to France, where he allegedly set fire to the Prefecture, he and his mother will announce publicly that he s the illegitimate son of King George. An honourable King must be saved from himself. It s a delicate affair which requires the skills of Britain s recently formed Secret Service Bureau. Captain Matthew Ranklin and O Gilroy are brought in to check out the claims and as Ranklin begins to expose the truth behind the concealed facts, he realises there s no fire without an awful lot of smoke...