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Hong Kong police officer Mina Kao (Joyce Mina Godenzi) marries Huang Tsung-Pao (Tony Leung Ka Fai), who is a member of a law enforcement dynasty. His father (Sammo Hung) and his many sisters are also officers, and the eldest sister Chia-Ling (Carina Lau) is one of the highest ranking women in the police department. When a Vietnamese gang begins a rampage through the city, the women must overcome their suspicion of one another to bring the criminals to justice. Wikipedia