A fairly standard revenge plot is augmented with interesting characters, solid kung fu and a Riz Ortolani soundtrack shamelessly lifted from Day of Anger.
The titular "Triangular Duel" (more properly referred to as the "Iron Triangle" in the subtitled Mei-Ah dvd version) is a "strategy" pitting three men against one. One of these three men - from Japan - punches with fists as hard as iron, another - from Korea - kicks with feet as hard as iron, and the third - from China - has a body that can withstand any beating thanks to skin as hard as iron. And, of course, the only man who has a chance of defeating them has vowed not to fight for a full year, and he's intent on keeping that vow, even after the Master to whom he made it, has moved on to that pile of breakable kung-fu bricks in the sky.
The titular "Triangular Duel" (more properly referred to as the "Iron Triangle" in the subtitled Mei-Ah dvd version) is a "strategy" pitting three men against one. One of these three men - from Japan - punches with fists as hard as iron, another - from Korea - kicks with feet as hard as iron, and the third - from China - has a body that can withstand any beating thanks to skin as hard as iron. And, of course, the only man who has a chance of defeating them has vowed not to fight for a full year, and he's intent on keeping that vow, even after the Master to whom he made it, has moved on to that pile of breakable kung-fu bricks in the sky.