However, his hopes to return to his normal duties in the Australian Imperial Force, are dashed when he is ordered to participate in a desperate MI6 mission to hunt for an Irish terrorist in the employ of the ambitious German spy, Captain Von Rintelen. The Irishman has been sent to London to destroy the munitions factory in the London suburb of Silverton, in the hope that its destruction will limit Britain's ability to continue to wage the war. Green is ordered to eliminate the terrorist before the factory is destroyed. Sadly, the complexities of international espionage, political intrigue, inter service rivalry, and murderous criminal intent, combine to make his task almost impossible. If he fails, London will suffer significant civilian casualties, damage to infrastructure, and his mission will be amended to be one of revenge.