Onequietsnowymorning,acarrollsintoasmallhospital.Outofthecarstepstwowomen,onecoveredinscars,andtheother,stabbed.Do-kyungclaimsthattheunconscious,stabbedwomanishersister.SergeantHyun-jubeginstoinvestigatewhathappenedtothetwowomen.SergeantKimgoestotheaddressthatDo-kyungprovided,andonlytorealizethatthereismorethingthanshethoughtinthiscase.