Luke Powers travels to L.A. to find that his brother has been murdered in a back alley martial arts tournament. Luke enters the tournament circuit to try to flush out his brother's killer. With the help of a trainer and former fighter, Lucke enters what he thinks will be a victorious battle.

A lawyer's family is murdered by drug smugglers, and he is beaten and left for dead, but survives although in a coma. When he awakes he only has a partial memory of what happened. In order to find out the real story, he trains with a karate master and becomes a mysterious avenger known as "The Karate Man".

查克·诺里斯饰演一名正直的芝加哥警探艾迪，却夹在贪污的警察局同僚和当地的义裔帮派之中，使他变成一个我行我素的独行侠。在一次监视黑帮火并的过程中，艾迪因故未能赶抵现场，导致无辜者惨死，并且有人遭黑帮绑架，他必须尽力将歹徒的行踪调查清楚并救出无辜。另一方面，局中有贪污同僚滥杀义裔小孩被另一年轻警员看到，但他却不敢说出真相。于是艾迪在消灭黑帮之余，还要分心对付自己人。

1976 film