March 1915.
The Great War has raged for seven months.
No one believes it will last much longer-not old Skipper Williams of the Hull trawler the Kestrel, and not Captain Joseph Krieger of the German U-boat the SM U-19. Williams is far too old to be at sea. The Admiralty has requisitioned most of the fishing fleet, and any able-bodied man has joined up for the war effort, so the skipper is left with a misfit crew. The Humber...