MasterKaei,theheirtotheaffluentandwell-regardedKarasumafamily,isbackathomeinJapanafteraperiodofstudyingintheUnitedKingdom.BackatthemansionhehasKisaragiSomatoservehim.Somaisefficientandintelligentbeyondhisstation.Thereissomethingunusualafootandthetwomenneedtocounterit.