明朝成化年间，朝纲腐败，奸邪当道。西厂东(dōng )厂(chǎng )为(wéi )宦官把持(chí )，混淆黑白，陷害(hài )忠良，朝(cháo )野(yě )内外噤若寒蝉。时有赵(zhào )怀(huái )安（李(lǐ )连杰(jié ) 饰）等流亡剑客挺身而出，接连铲除东厂数名奸佞，致令阉贼胆战心惊。适值此时，风(fēng )头正(zhèng )劲的西厂(chǎng )