Jackie plays Foh, an expert mechanic who has returned from Japan after a master course at Mitsubishi Motors. He runs a small business in Hong Kong along with his father and two sisters. In his spare time, he also helps the police out by checking cars that have been illegally upgraded. One night, psychotic street racing driver Warner Krugerman, aka Cougar, speeds past Foh and the cops. Foh gets into a car and stops Cougar heroically. Cougar lands in jail, but breaks out eventually. He gets revenge on Foh by trashing his business and kidnapping his sisters. The only way Foh can get his sisters back is by racing cougar in Japan. He now must retrain himself in race car driving so he can be at his best to race Cougar.