The Devilish Killer (1971)

The Devilish Killer is the most dangerous fighter that ever lived...After defeating all of China’s martial art factions in a grand battle, he decides that his victory cannot be complete unless he possesses the two Thunderbolt Swords. The leader of the Thunderbolt Sword clan sends his two sons into hiding knowing that sooner or later the Devilish Killer will come for them and destroy his clan. After the two sons leave, taking the Thunderbolt Sword with them, fate leads them to meet a young swordswoman who owns the other Thunderbolt Sword and together they unite their swords and train for the ultimate showdown with the Devilish Killer.