Fumihiro Kuki (Hiroshi Tamaki) is a son from a wealthy zaibatsu (conglomerate) family. His father raises him to become pure evil. Fumihiro Kuki kills his father to protect his adopted sister Kaori (Yuko Araki).
Afterwards, Fumihiro Kuki disappears. He undergoes plastic surgery and takes the identity of Koichi Shintani. He watches Kaori and faces the great evil that exits within the Kuki family.