Scionoftheonce-richMitchellfamily,HerbertWynnisfoundshottodeath.NurseAdams,boredbyhospitalroutine,isrecruitedbythepolicetoferretoutcluesasshetendstoWynn'selderlyauntJulia.Jokinglygiventhe'rank'ofMissPinkerson,afterthefamousdetectiveagency,Adamsprobesintothemystery,butnotbeforeaseconddeath.