KangHyeon-joong,aformerNationalIntelligenceServiceagent,iscurrentlyrunningaprivateinvestigatorofficeafterhequithispreviousjob.HanMi-soishissecretaryhelpinghimwithhisdailytasksintheoffice.Oneday,KimJin-heecomestothedetective’sofficeandrequestshimtoinvestigateallthewomenwhofollowherhusbandaround.SheintroducesherselfaswifeofJangJoon-seok,CEOoftheprominentconstructioncompany,Dae-hoTrading.Whenshestarteddatinghercurrenthusband,whousedtobeamerefrontlineemployee,herfathertrainedhimintoaprofessionalentrepreneurandthenpromotedhimtothecurrentposition.Whenherhusbandbecamesuccessful,womenbeganpursuinghim.Shesaidthesewomentriedtoblackmailherhusbandformoney.KangHyeon-joongacceptstherequestandstartsinvestigatingthewomenaroundJoon-seok.WhenKangHyeon-joongfindsoutthatthereisthiswoman,So-yeon,whoseesjoon-seokoften,hescoldsSo-yeon.However,shesaysitisunfairbecauseitisJoon-seok,whoisbotheringher.