8th century China. 10-year-old general's daughter Nie Yinniang is abducted by a nun who initiates her into the martial arts, transforming her into an exceptional assassin charged with eliminating cruel and corrupt local governors. One day, having failed in a task, she is sent back by her mistress to the land of her birth, with orders to kill the man to whom she was promised - a cousin who now leads the largest military region in North China. After 13 years of exile, the young woman must confront...

In 1905, the revolutionary Sun Wen intends to visit Hong Kong to discuss his plans for revolution with fellow Tongmenghui members. Ultimate goal is to overthrow the corrupt Qing dynasty. However, a group of assassins is sent to kill Sun.