For thousands of years, the ninja assassins from the East have only been regarded as a legend. However, Mika (Naomie Harris), a court investigator in Berlin, has targeted this legendary ancient and mature assassination organization while investigating a series of political assassinations. Through secret investigation, Mika learned about an assassination group called Ozunu, and in a surveillance video, Mika saw a young oriental face, this person is called Raizo (Rain). Xuezang was adopted by Ozunu's assassination group when he was young and trained him to be an excellent ninja assassin. However, the kind-hearted Xuezang did not lose his conscience in the beast training. He eventually fled the group because he was tired of killing and lived in seclusion in Berlin. At this time, Mika has become the target of the assassination group. At a critical moment, Raizo appeared in time to save Mika. Xue Zang hopes to get Mika's help to completely destroy Ozunu... The film is directed by James McTeigue, who directed "V for Vendetta", and starred by Asian popular superstar Rain. This is his second work after entering Hollywood.