The master was murdered because of what he was doing, but his secret was well hidden.
7 seconds sound clip from the Mysterious Footworks of Kung Fu movie soundboard.
You can hear this line at 01:10:39.176 in the Blu-ray version of the movie.
Quote context
[...]
- Ba-Ching, Ba-Ching, tell me!
- The master was murdered. Terrible.
- The master was a revolutionary. He devoted his life to trying to stamp out the opium traffic.
- He had only a few men. Between them, they waged war on the dealers. Now he's dead.
- The master was murdered because of what he was doing, but his secret was well hidden.
- Until you fell in with Chu, and you said he was the masked man. Today, they came and killed him.
- What do you say, that I'm the cause of his death? Is that true?
- Master always considered you honest. And I know, too, that it wasn't your fault.
- You mean, I was used? Shao-Lung and Master were killed because of what I said?
[...]