Another cult classic from the shaw brothers studio, the flag of iron is a quintessential hong kong tale of rivals, betrayal and family feuds. When the master of the iron flag clan is killed by a mysterious assassin known only as spearman, it sets off an explosive chain of events which pits two brothers against each other in an action packed adventure of fist flying fury.directed by chan cheh the one armed swordsman, five venoms, this kinetic and highly influential kung fu picture, mixes traditional storytelling with more modern presentation techniques, layering acrobatics, the use exotic weaponry and quick as lightening fight sequences to produce a sure fire entertaining hit, which no serious collector of martial arts movies can be without.