In the ruthless underground world of the yakuza, no one is more legendary than boss Kamiura. The truth is that he is a vampire yakuza boss! One day, assassins delivered him an ultimatum: Return to the syndicate he left years ago, or die. Kamiura refuses, and after fierce battle he bites Kageyama, leaves him vampire power while dying. Begins to newborn abilities Kageyama dreams of avenge the murder of his boss.