One day he receives a package from Kozue Yamaya: she reveals that, when she was a young mother, she and her baby were kidnapped by Yakuza as payment for her husband's debts and she was forced to prostitute herself. Her child, also named Eiji, was killed and his organs sold illegally. She managed to escape, became a private eye and dedicated her life to investigating the gang that killed her child. She is presumed dead but sent discs of information on the Yakuza organ-harvesting ring to several people she trusts, including Eiji.