While Watson has been busy ministering to the sick during the war, Holmes has been immersed in a top-secret case. Watson is instructed to take care of the seriously ill Chancellor, Prince Max, who has the potential to overrule General Ludendorff and bring about peace. Yet with Prince Max's condition worsening and so little time, Watson and Holmes must work on decoding the President of the United States letter which contains information and instructions that are essential to restore peace.