明朝成化年(nián )间，朝纲腐败，奸邪当(dāng )道。西厂东厂(chǎng )为宦官把持，混淆(xiáo )黑白，陷害忠良，朝野内外噤(jìn )若寒(hán )蝉。时有赵(zhào )怀安（李连杰 饰）等流亡剑客挺身(shēn )而(ér )出，接连铲除东厂数名奸佞，致令阉贼胆(dǎn )战心惊。适值此时(shí )，风头正劲的西厂