Tosavehermother'scompany,TheamadeadealwiththemysteriousWilliamGroup.Blindfolded,shewastakentoanancientcastleandgiventoavampiredukeshehadnevermet.Afterthatnight,shegavebirthtofourgiftedchildren.Nowherbodyisfailing.Tosaveher,thechildrenmustfindtheirfather-andstealhisblood.Butnothingiswhatitseems.