Two young midshipmen stand between Britain's Royal Navy and catastrophe . 1913: Naval midshipmen de Vere Smith and "Dickie" Bird are recruited by the mysterious secret service to spy on the German Navy's plans. Narrowly escaping death at the hands of the German spymaster Klaus von Bismarck, the two midshipmen bring home the revelation that Germany intends to use the unguarded Frisian Islands to attack Britain. It isn't until a year later that the Admiralty realize they should have listened . Now a new plan is being hatched - one that will destroy the entire British Navy. Can the two brave officers manage to save the Royal Navy from total defeat at what became known as the Battle of Jutland?.