This movie is rated at Category III, I'm not sure why. Sandra Ng won the 1998 Best Actress award for her portrayal as Sister 13, the tough bi-sexual triad head of the Portland Street district of the Hung Hing triad society. Hsu Chi also won Best Supporting Actress for her portrayal as a drug addict who befriends Sister Thirteen (actually saves her life). Arguably the best of the Young and Dangerous and offspring movies, this movie is a 'biography' of Sister Thirteen first starting out as a triad member, and her relationships with her female and male lovers.