Liu, a Chinese intelligence officer, goes to Paris on assignment and becomes embroiled in a deadly conspiracy. When the man he has come to help betrays him, he is forced on the run, accused of a murder he didn't commit. He teams up with Jessica, an American woman forced into prostitution against her will, who wants to escape and seek justice. As Jessica and Liu go up against cunning and ruthless adversaries, Liu makes a promise to Jessica that could compromise his career -- and even his life.