数千年来，来自东方的忍者刺客只是被当作一个传说，然而柏林的法院调查员米卡（娜奥米·哈里斯 Naomie Harris 饰）在调查一系列政治暗杀案时却把目标锁定在这个传说中古老而又成熟暗杀组织。通过秘密调查，米卡得知一个叫奥祖奴的暗杀集团，而且在一盘监控录像里，米卡看到一张年轻的东方面孔，这个人叫雷藏（Rain 饰）。雪藏年幼时即被奥祖奴的暗杀集团收养，并且把他训练为一个出色的忍者刺客。然而善良的雪藏并未在兽化的训练中泯灭良知，最终因厌倦杀戮而逃离集团，并且隐居于柏林。此时，米卡已成为暗杀集团的追杀对象，在危急关头，雷藏及时出现救下米卡。雪藏希望得到米卡的帮助，从而彻底摧毁奥祖奴……
本片由曾执导《V字仇杀队》的导演詹姆斯·麦克提格（James McTeigue）担当导演，亚洲人气小天王Rain主演，这是他在打入好莱坞之后的第二部作品。

Raizo is one of the deadliest assassins in the world. Taken from the streets as a child, he was transformed into a trained killer by the Ozunu Clan, a secret society whose very existence is considered a myth. But haunted by the merciless execution of his friend by the Clan, Raizo breaks free from them...and vanishes. Now he waits, preparing to exact his revenge. The soundtrack includes music from David Bowie, The Human League, Spiderbait, Ryuzo and a new song by Raekwon featuring Xzibit and Murs. The album also includes music composed by Ilan Eshkeri.