Full concentration in every second. Every single move has to be right - only one mistake could have fatal consequences. Lo and Cheung are on the streets of Hong Kong for the "Invisible Squad", a special unit that is supposed to ensure law and order on the city's highways. Every mission requires everything from the two of them and there is always the risk of risking your own life. By chance, a brutal gang of robbers comes into the sights of the two police officers. Regardless of losses, a risky chase through the dark, dusty streets of the Asian metropolis begins. A merciless race takes its deadly course.