Sammo Hung and Lau Kar Wing are the Master of Swords and the Master Of Spears respectively. Every year for 15 years they have duelled and it's always been a draw. In the 15th year, each refrains from a fatal blow and they realise they can't kill each other because they've become (sort of) friends. The solution is to each train a student - since the students won't know each other, they should be able to kill each other no problem! In a stroke of genius, each actor plays his enemy's student, meaning that we get to see each demonstrate their remarkable skills with both weapons!