明朝成化(huà )年间，朝纲腐败，奸邪当(dāng )道。西厂东厂为宦官把持，混淆黑白，陷害忠良，朝野内外(wài )噤若寒(hán )蝉。时(shí )有赵(zhào )怀(huái )安（李连杰 饰）等(děng )流亡剑客挺(tǐng )身而出(chū )，接连铲除东(dōng )厂数名(míng )奸佞，致令阉贼(zéi )胆战心惊。适值此时，风头正(zhèng )劲的西厂(chǎng )