Fact1: Carruthers is invited on yachting and duck-shooting holiday by old University acquaintance called, Fact2: Royal Navy is misdirected to meet British perspective which strategically, Fact3: Davies has invited Carruthers presence given ability to speak German and professional contacts within Whitehall on pre-text of holiday, Fact4: Reich is using naval base hidden in islands to carry out rehearsals for seaborne passage across North Sea of German army with aim of militarily invading England, Fact5: Davies boat to allow him to return to Germany to seek medical assistance for wounds at insistence of Clara revealing German plans in detail
Output: In the Spring of 1901, Carruthers, an aristocratic junior official in the British Foreign Office, is invited on a yachting and duckshooting holiday by an old University acquaintance called Arthur Davies. On Carruthers arrival on Germanys Northern coast to join the yacht Davies explains to him that he has a hidden agenda for the trip and the invitation beyond duckhunting. While boating around the Frisian Islands ostensibly correcting antiquated British sea charts of the coastlines shifting topography, by chance he had met a retired German sailor by the name of Dollman and his family, including a daughter called Clara, with whom Davies has initiated a romantic attachment. He narrates further that whilst sailing together along the coast in a gale Dollman had, when Davies had tried to put into a particular estuary for shelter, inexplicably prevented him from entering by executing a deliberately hazardous seamanoeuvre, to the degree that both their lives had been endangered by it. Davies then reveals to Carruthers that his real interest in the area is that he suspects that the Imperial German Navy is engaged in covert military activity of some nature in the Frisian Islands, with the intention of threatening the security of the North Sea from the British perspective, which the Royal Navy is strategically misdirected to meet, and this is why he has invited Carruthers presence, given his ability to speak German and professional contacts within Whitehall, on a pretext of a holiday. Carruthers and Davies go on, amidst cryptic warningsoff from circling German naval officers, sailing expeditions among the Frisian isles and inlets, and fights, to carry out covert surveillance at the estuary in question, to discover that the II Reich is using a naval base hidden in the islands to carry out rehearsals for a seaborne passage across the North Sea of a German army with the aim of militarily invading England, and that Herr Dollman is in fact Lieutenant Thomas, an embittered former Royal Navy officer who is treasonously assisting their preparations with his detailed knowledge of Englands coast and naval defences. After sabotaging one of the rehearsals, whilst escaping to Holland by sea in 2 roped yachts with the information about it, along with a badly wounded Thomson and his family as prisoners, Davies abandons Thomson with his wife in Davies boat to allow him to return to Germany to seek medical assistance for his wounds at the insistence of Clara, who agrees to accompany Davies and Carruthers back to England in her fathers yacht with his papers revealing the German plans in detail. Thomson and his wife are murdered by the pursuing German authorities  led by Kaiser Wilhelm II, in person  when their vessel is rammed and destroyed. The film ends with the yacht bearing Carruthers, Davies and Clara bound for Holland, with a Carruthers voiced narration detailing how their return to England with the information would lead to a shift in Englands sea defence strategy towards the II Reich, that would avert the threat of war.