In ancient China during the Qin Dynasty, an assassination attempt is made on the emperor by a brave individual in order to save their homeland. Despite the attempt's failure, the emperor orders his troops to kill the assassin's eight-year-old son as retaliation. A highly skilled swordsman steps in and rescues the boy. Following their escape from the emperor's forces, they embark on a journey to alter the fate of the empire while encountering both allies and adversaries along the way.