In a small town in China, a martial arts school led by a skilled instructor stands as a popular hub for local students. The school finds itself in conflict with a rival dojo specializing in deadly techniques. Tensions between the two escalate when the antagonist school seeks to dominate the local martial arts scene by any means necessary. During a confrontation, the rival school hires a notorious group of assassins, consisting of various international martial arts experts, who launch a ruthless attack on the hero's school. In the chaos, the protagonist, a talented fighter from the peaceful school, loses his arm in a violent encounter. Defeated and devastated, the protagonist retreats, consumed by a desire for revenge but hindered by his newfound disability.

During his solitude, the fighter discovers an elderly herbalist who takes pity on him and teaches him unique techniques that maximize his remaining strength and agility despite his injury. As he trains, he transforms his handicap into a powerful asset, honing specialized skills that few can match. With renewed determination, he embarks on a journey to confront those who wronged him and restore honor to his devastated school. Along the way, he faces fierce adversaries, each adept in different fighting styles, testing his newfound abilities to their limits. Empowered by his mentor's teachings and driven by justice, he prepares for a final confrontation with those responsible for his suffering.