Shun Tanaka and his sidekicks, Zara and Vuk, were well-known assassins in the underworld, that even the strongest warriors feared. But one day a tragedy happened, one that changed Shun's life forever. He decided to start a new life, redeem and atone for his sins. But the path he chose wasn't an easy one, especially for a previous killer. When he was about to give up, a mysterious girl appeared, offering him a helping hand...
