Ayearafterhermurder,thepolicere-openthecaseofYvonneHarrisonwhentheyreceiveananonymousletterimplicatingaburglar,HarryRepp,whoisabouttobereleasedfromprison.Supt.StrangeassignsthecasetoDSLewis,whoischafingatthebitawaitinghispromotiontoInspector.Morsehasbeenillandhasonlyjustreturnedtowork.HestepsonLewis'toesbyinvolvinghimselfinthecase,butasthebodycountrises,Morsefindshimselfinchargeofinvestigatingawomanwhohadmanyaffairswithmanydifferentmen.Whenhelearnsthatthedeadmenwereinpossessionoflargeamountofcash,hesuspectstheywereblackmailinghermurderer.