警探雷•维尔克鲁（科林•法瑞尔 Colin Farrel 饰）在加州芬奇市工作，跌入人生谷底消沉多年，他离异，酗酒，脾气暴躁。他是当地黑帮头目弗兰克•谢苗（文斯•沃恩 Vince Vaugh 饰)的手下，弗兰克多年前除掉了强奸雷妻子的男人。他为谢苗干一些零活, 比如殴打 了一个最近写了一系列组织犯罪事件的记者。维尔克鲁最近的活儿是找到失踪数日的市政执行官本•卡斯帕雷的下落。文图拉县警长安妮•贝德拉丝（瑞秋•麦克亚当斯 Rachel McAdams 饰）在工作上很成功，却疏远了她从事色情主播的妹妹阿西娜以及她身为新宗教领袖的父亲。加州高速公巡警保罗•沃德拉夫（泰勒•克奇 Taylor Kitsch 饰）得知他被停职处理，一个年轻女人谎称他要求和她性交易才能放行。
一天深夜，一男子被发现端坐在高速路边的长椅上已经离奇死亡，三位来自不同城市和不同政府机构警察汇聚在一起联手侦查此案。在调查过程中，他们逐渐发现案子远比他们设想的复杂得多。

Duplicity and treachery...nobility and honor...conquest and triumph...and, of course, dragons. In Season 3, family and loyalty are the overarching themes as many critical storylines from the first two seasons come to a brutal head. Meanwhile, the Lannisters maintain their hold on King's Landing, though stirrings in the North threaten to alter the balance of power; Robb Stark, King of the North, faces a major calamity as he tries to build on his victories; a massive army of wildlings led by Mance Rayder march for the Wall; and Daenerys Targaryen--reunited with her dragons--attempts to raise an army in her quest for the Iron Throne.