An amazing secret that has influenced the structure of the world's Yakuza brought together the main female and male leads who had been separated for 15 years. As of current, one has become a trump female agent, and the other has become a powerful Yakuza. After 15 years of searching and waiting, what sparks will be produced when they meet again? Those two were caught in various extreme forces of the infighting and intrigue. How will their feelings develop?