DeputyAssistantCommissionerCharlieHillianiskilledonthenightofhisretirementparty.HillianwasatonetimeaseniorofficerinOxfordandwasinfactMorse'sboss.Hewasalsowritingabookabouthismostmemorablecases,includingoneabouttheunsolveddeathofan8-year-oldgirlsome18yearsago.Thesuspectinthatcase,FrederickRedpath,wasatHillian'shousethedayhediedandthatchapterfromthemanuscriptismissing.Thereareothersuspectshowever,includingHillian'sghostwriterwhowillnowreceiveallofthebook'sroyalties;ahandymanwhowasworkingontheproperty;andRedpath'sdaughter,whoknewthelittlegirlwhowaskilledallthoseyearsbefore.MorsecomesintoconflictwithwithacolleagueDCIDawson,whowasoneofHillian'sprotégés,astheyagainlookintothelittlegirl'sdeath在视听表达上，导演有意弱化戏剧元素。数字修复让历史影像焕发活力，全彩上色增强画面细节，画面呈现拓展表现空间。但技术使用十分克制，整体色调保持历史本色。整体表现注重精神价值。色彩选择体现历史责任感，声音设计追求简约风格。