In the Jianghu, the fight between two martial arts families lasted for hundreds of years until a warrior with superb swordsmanship (played by Jang Dong-gun) appeared in the sad flute family. He slaughtered the enemy and eliminated the biggest worry of his master (played by Ti Lung). After the killing, the warrior chose to retire. He took a baby, the last blood of the enemy family, and went to the American West amid the layers of pursuit sent by the master to punish his betrayal. In a desolate western town, the warrior inherited his friend's laundry. The warrior who sealed the scabbard began to try to integrate into the lives of ordinary people. Lynn (Kate Bosworth), a knife-throwing girl in the local circus, had her parents killed by gangsters. The girl who survived the disaster has been practicing knife-throwing to try to avenge her parents. Similar past experiences made the warrior and Lynn close, and teaching Lynn kung fu became the warrior's main activity after work. Soon, the gangsters invaded the town again. Under the organization of the warrior, the former sharpshooter Ronald (Geoffrey Rush) and other residents prepared to fight the gangsters to the death. The hunting group led by the warrior's mentor was also rushing here at full speed...