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Cynthia Yang Li-ching once again stars in this final installment of the lucrative In the Line of Duty series, directed by Cha Chuen-yee. The film opens with innocent U.S. Marine David Ng (David Wu Tai-wai) getting entangled in the machinations of a nefarious South Korean gang selling military secrets to the Russians and the equally nefarious CIA. When he gets framed for the actions of his recently deceased comrade-in-arms, who was a member of the gang and the subject of a CIA investigation, David skips town and manages to enlist the reluctant support of Madam Yang (Yang) to help clear his name. Eventually, Yang manages to track down May (Alvina Kong), the only person who can attest to David's innocence. Of course, the gangsters are busily plotting to snuff out everyone involved. This film was confusingly dubbed In the Line of Duty 2 for the Taiwanese release.