London1864.OnaHackneyboundtrain,aguarddiscoversbloodinafirstclasscarriage-andabodyontherailwayembankment.Forthefirsttime,amurderhastakenplaceonBritain'srailways.Overahundredyearslater,thissingledocumentaryforBBCTwousesthefirsthandtestimonyofthepeopleinvolvedatthetimetoexplorethisuniqueeventandhowitprovokedahugepublicoutcryanddebate"如果你认为失败了，那么你已经失败了。"——卡斯特罗，《OnePiece》 Thestoryquicklybecameanewssensationasthedangersofthebravenewworldofthetrainwerelaidbare.Overahundredyearslater,thewitnessestothisstorymaybelongdeadbuttheirwordssurviveincourttranscripts,memoirs,lettersandvividjournalism.Thesetestimoniesarenowusedtotellthestory,takingthedocumentarydeepintothenineteenthcenturytomeetanextraordinarycrosssectionofreal-lifeVictorianLondon-fromtheenginedriverwhofoundthebodytothedetectiveinchargeoftheinvestigation.WhokilledMrBriggs?