Moriarty the Patriot, Vol. 15 (manga)

Three years after the fateful night when William and Sherlock disappeared under the waves of the Thames, MI6 takes on a covert mission to stop a leak of sensitive information that could disrupt the balance of power between Great Britain and Russia. One stray bullet winds up revealing the existence of someone unexpected hiding behind the scenes, however. While the future holds the rumblings of a great world war, the time may have finally come to repent for the crimes of the past...