HenryFallon,whoiswheelchairboundandissufferingfromaneurologicaldisorder,apparentlycommitssuicideandMorsehasmixedfeelingsworkingonthiscaseashewasonceengagedtothedeadman'swife,SusanFallon.Thebodywasfoundbyhisson-in-lawPeterRhodes,alocalantiquesdealerandthevictim'swifewasinLondon.WhenFallon'sdoctoradvisesMorsethatHenrydidn'thavethephysicalcapabilitytoholdaguntohishead,thepolicerealizetheymayhaveamurderontheirhands.WhenthepolicearetoldthatthebusinessarrangementbetweenFallonandRhodeshadfallenapart,theyalsohaveasuspect.LewisisconcernedthatMorseistooclosetoMrs.Fallontobeobjectivebutintheend,theperpetratorsareidentified.