Sou kiyoi is the son of the strongest yakuza clan, he is the prince, a man without emotion, fearless and dangerous ..has his life turn upside down when he kidnap a wrong person who witness the crime he just made .. Kazunari hira is the leader of the metro politan police,the yakuza's biggest enemy, he pretended as a neird, stuttering innocent man just to trace down the underground business of the clan and take them down as an order .. But his life mess up when he met the prince and make the biggest mistake in his life..