A ronin is unleashed in Chinese land! China. In a country that is darkened by the chaos of civil wars, investigator Nanguang is charged by the minister to hunt for mysterious murderers targeting innocent young girls. Kang Jie maintains a secret relationship with Nuo, the daughter of one of the masters of the region. One evening, they witness the assassination of Inspector Nanguang. They are saved by a Japanese Rônin, who is mastering the art of sword, but haunted by a painful past... Trapped by unsuscitable killers, Yukio and his two companions will have to avoid falling into traps as many as brutal and face the very essence of mystery. They will have to do hard to bring to light a secret that is more terrifying than anything they could have imagined...