After a harrowing tour in Afghanistan, Dr Watson returns to London to convalesce at 221B Baker Street, home to the enigmatic Sherlock Holmes. Their lives are irrevocably thrown together by news that a man has been found dead in a grimy ‘ill-omened’ house, with the word ‘rache’ – German for revenge – written in blood on the wall. This grisly discovery is complicated further by the look of utter horror on the victim’s face, and the complete absence of any wounds on the body or sign of a struggle.


華生醫生自阿富汗歷劫歸來後，回到倫敦休養。他落腳貝克街221號B，與怪探福爾摩斯成為室友。某日，市區發生一樁神秘命案，徹底改變了華生和福爾摩斯的生活，兩人從此成了最佳拍檔。某間髒亂的「凶屋」裡發現一具男屍，牆壁上用血寫著「rache」，亦即德文「復仇」之意。更詭異的是，死者面目猙獰，生前顯然遭受極大恐懼，身上卻找不到任何傷口或打鬥的痕跡，為這樁離奇命案更添神秘色彩。