Remp-It is an action movie about the real life of "Mat Rempit" the illegal motorbike racers of Malaysia. It is about Madi, a dispatch boy who shows off his motorbike skills by racing at night. Madi wants to save enough money to buy a new motorcycle, rather than settling down with his girlfriend Ieka.
After winning several races, Madi gets a challenge from Spark, another well-known 'Mat Rempit', with their own motorbike as the wager. Result: Madi loses not only his bike but also his girlfriend. He also finds himself in deeper trouble than he has expected. When the two rivals meet again, they face-off in another race. Now, will Madi recover his pride as the top racer, or...?