The story about the well brought-up girl (JENNIFER Yeung Ling) who is a police force and have an opportunity involved in a SWAT Mission code named FOX HUNTER, to capture a hard-core, borderless criminal, YAM TUNG, better know by the law-enforcers as the FIREFOX for his violence and cunningness. CHAN HONG is Jennifer partner, is an example of a street survivor. Jennifer sneaks into Mainland China illegally with CHAN HONG to hurt for Yam who has done her servere damage, both mentally and physically, a nightmare that her continuously, and the driving force behind her pursuit.