Zie'en is the name for the black dragon race which for thousands of years has been the empire's greatest enemy. The hunt for Zie'en has always been a very dangerous mission for samurai, even trained samurai. Then, the secret organization that runs behind Emperor Kagorou's shadow is the best organization to hunt down Zie'en. The samurai in this organization acted individually to kill Zie'en and they are required not to reveal their true identity to anyone and must keep their real identity a secre