“S” is working in his own car repair shop and has a hobby with good techniques for modifying cars with accelerators. One day, his brother Alex returned after being disconnected for many years, which caused him to join a mysterious group called WANTED. Alex only trusted his brother and asked him to fix his car and tell him what has happened during these years. Unfortunately, Alex has slipped into a coma after a car accident.

Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.