There's no romance or other side plot to this movie, it's action and intrigue all the way, making it a real man's kung-fu movie.
An aging master dispatches his last disciple Yan Tieh to stop his five former pupils who's styles represents five venomous animals centipede,snake, scorpion, lizard and the toad. Despite the word "Venom" in the title, none of these pupil uses venoms to kill their opponents. Yan Tieh told by his teacher that he's no match for the five former pupil, must find one he can form an alliance with to defeat the other four. How Yan Tieh and the others find each other is the intrigue to the story, with good kung-fu action spread out throughout the story.
Recognized as a cult classic, this movie has already established itself in the annals of kung- fu action movies. It's known well enough that other movies make reference to the five styles depicted in this story.
It's no artistic masterpiece, with the usual bad dubbing, and corny acting, but the movie is one of the best of its kind, because its so focused on the all the ingredients of kung-fu action movie of its time, and gives an extra concentrated dose of them.
One movie you must watch if you are a kung-fu movie fan.