The plot surrounds two assassins Sister Ko (Michelle Yeoh) and Sing (Tony Leung) from the Happy Forest, who are trying to protect their kingdom from a neighboring group of rebels from Elites Villa...or something. That part is not really clear, but mainly serves as a backdrop to the real story which is the subplot love quadrangle that includes the two assassins, another assassin Yip (Donnie Yen) and Sing's girlfriend Butterfly (Joey Wang). Though the three assassins are like siblings, they are not blood relatives. There is a funny flashback sequence explaining how they met and how Sister Ko came to "raise" the younger boys. As adults however, Sister Ko seems to have formed feelings for Sing and disdain for Butterfly with whom she has to compete for his attention. They have a bitchy tea party that is one of the films comedic highlights. Meanwhile, Yip is the one who harbors feelings for Sister Ko, but he's too bashful to act on them. Unfortunately, the film favors the undercover assassins plot over the love story in terms of resolution, so it doesn't really go anywhere. It's also interesting to see how far the culture has come in twenty years. The women fight valiantly as equals to the men, but an unmarried pregnant woman fears being drowned by he townspeople. Yes, the movie is set in the past, but it's something to look at as much as the evolution of the martial arts choreography.