In order to release his kidnapped sister, sports car mechanic, Chan Foh To, has to defeat a super-criminal street racer.

The world's ten most influential scientists are being mysteriously killed, one by one, spontaneously combusted, microwaved to death, or otherwise. Another scientist, software prodigy Dr. Ken, searches for clues to these bizarre happenings only to see his fiancee apparently return from the dead. As indications point to the end of the world, It appears that Dr. Ken may be the only one who can save humanity.

An undercover cop badly injured in a raid is blamed for the raid's failure and thrown out of the police department. His injuries result in his being paralyzed form the waist down, and doctors tell him that if he doesn't have an operation within a few months, the paralysis will be permanent. His friends in the police department decide that, since the underworld was responsible for their friend's injuries, the money for the operation should come from them, and they set out to get it.

Sky is the king of the underground car racing circuit. After winning a hard-fought race, Sky is set up by his archrival Tang Fung.