Haofeng Xu makes his directorial debut with this Chinese martial arts film adapted from his own novel. During the Ming dynasty, four fighting schools exist in the city of Guancheng and anyone who wishes to set up a new establishment must prove their worth in battle. When Liang Henlu (Yang Song) tries to form a fifth school, the martial arts masters mistake his sword for a forbidden Japanese weapon and believe him to be a pirate. After witnessing the power of the sword in combat, however, they begin to realise it could be the legendary weapon that was used by Liang's now deceased general to defeat the invading Japanese forces. As the general's last surviving bodyguard, Liang wants to set up a school so he can pass on his master's teachings. Will he succeed?