上一季完结时，Vic已经已经到了绝境的边缘；由于Shane需要亚美尼亚黑帮的帮助，全盘脱出了他们抢劫黑帮运钞车的内幕，使得Vic的家人遭到亚美尼亚黑帮追杀；自己也面临的最终委员会的审查，职位不保。却发现了最后一颗救命稻草，墨西哥黑帮势力的入侵使得Vic和Aceveda再次走到一起，并意外获得了一箱子墨西哥黑帮控制的公司Pezuela收集的法明顿地区高级干部的内幕。
新的一季中，Vic与墨西哥黑帮Pezuela公司是主要的焦点；还有如何处理和shane的关系，亚美尼亚黑帮仍然没有得到解决；Vic重新回归警队，还会有那几个队员？不知老冤家Forest Whitaker扮演的检察官是否这季会回归？Dutch与Danielle会好上吗？等等各种矛盾纠结。
The show made history by becoming the first ad-supported cable series to win the 2003 Golden Globe Award for Best Drama Series. In its first season, Shawn Ryan (Writing) and Clark Johnson (Directing) received Emmy nominations, which were also firsts for basic cable in those categories. The Shield has received two TCA nominations for Outstanding Achievement in Drama. As of March 2005, the show has become the longest running series on the FX Network.
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