The Deadly Duo

Original title: 雙俠

Directed by Chang Cheh

The plot involves patriots during the Sung Dynasty and their attempts to rescue a kidnapped prince from Ching troops who have invaded the north of China. The patriots are led by Ti Lung who recruits a mysterious but seemingly superhuman fighter played by David Chiang to find a way to cross a perilous bridge to enter an impregnable fortress to locate and rescue the imprisoned prince.