20年前,强盛的罗马帝国派出由5000精兵组成的罗马第九军团,却在苏格兰高地神秘消失。第九军团首领之子马库斯(查宁·塔图姆 Channing Tatum 饰)骁勇善战,带兵征战在前线。因为在一场战争中严重受伤,他不得不在叔叔家中养伤。养伤期间,马库斯在角斗场中救下一名奴隶埃斯科(杰米·贝尔 Jamie Bell 饰),并将其收为仆人。不久之后,马库斯听闻北方一个部落有人发现了当年父亲遗失的鹰杖,立志为父亲赢回荣誉的他决心远赴北方拿回鹰杖。马库斯带着对北方环境比较熟悉的埃斯科一起出发。路途中主仆二人的关系经历了各种起伏与相互考验。尤其是当他们遇到凶狠的西尔王子(塔哈·拉希姆 Tahar Rahim 饰)后,马库斯发现埃斯科的身份远远不只是个普通的奴隶那么简单。究竟谁掌控着鹰杖,当年的第九军团是如何覆灭的?真相愈加扑朔迷离……In 140 AD, twenty years after the unexplained disappearance of the entire Ninth Legion in the mountains of Scotland, young centurion Marcus Aquila (Tatum) arrives from Rome to solve the mystery and restore the reputation of his father, the commander of the Ninth. Accompanied only by his British slave Esca (Bell), Marcus sets out across Hadrian's Wall into the uncharted highlands of Caledonia - to confront its savage tribes, make peace with his father's memory, and retrieve the lost legion's golden emblem, the Eagle of the Ninth.