香港商界头面人物何森，以做生意为幌子，借内地某厂优质免检化工产品出口之机，不断将从我国西南边境贩来的毒品偷运进港。为彻底捣毁这个国际贩毒集团，香港警署派韦南、李彤来内地协助破案。何森与毒贩尹大华密谋，让走私匪徒化装成我边民，兵分两路声东击西偷运毒品入境。另一面，韦南、李彤遇到了重重困难，先后受伤。

Wong Wai-yip spins this cheapie action flick about a Hong Kong female ubercop named Li Tong (Sharon Yeung Pan-pan). As the film opens, Tong ventures into China to hunt down a band of villainous drug traffickers. Though she has been reluctantly paired up with her Mainland counterpart Chiang Hung (Sibelle Hu Hui-chung), Tong prefers to work alone, traveling incognito as a camera-happy tourist. Chiang dutifully tails her erstwhile partner, eventually saving her life from a high-kicking assassination attempt. Later, when the baddies catch up with Chiang and her, leaving her for dead, Tong saves her partner and agrees to hunt down these black-hearted villains together. Cult 1970s kung-fu star Carter Wong also makes an appearance in the film.