"KL Gangster" tells the tale of two brothers who get involved in the world of gangsterism. The older brother Malek (Aaron Aziz) was imprisoned for five years after being betrayed by his own gang which was started by Shark (Syamsul), the step brother of the most influential gangster in Kuala Lumpur, King (Ridzuan Hashim). Malek who leads a normal life after being released, is pulled back into the world he left behind after all those years. Especially since his younger brother Jai (Adyputra) is influenced by the gangsters and decides to work for Shark bringing everything down in chaos.

The movie is about a love story between Iskandar, a mute, and Dhia, a blind woman. Iskandar is a humble millionaire who saved Dhia from a road accident. Despite their handicaps, they fall for each other. Iskandar`s friend Ariel helps deliver whatever it is Iskandar wishes to say to Dhia. However, Ariel starts having feelings for her and no longer wants to be the messenger for his friend.

Two brothers, Malek and Jai, are indirectly thrust headlong into the world of gangsters and crime when their father died 10 years ago. Since their father's death, Malek, Jai and their mother have been threatened by gangsters whom their father owes money to. Desperate, the wild Jai turns to crime, and will do anything as long as it pays well. Jai's behaviour sees vehement opposition from Malek and their mother, which breaks up their family. To make things worse, Malek finds out that his sister Shera has been raped and their mother has cancer...

Ustaz Adam has to help a friend whose village is corrupted by a group of misguided religionists lead by a sinister sorcerer. To make matter worse, Adam himself is also being mysteriously haunted by evil apparitions that keeps disturbing him from time to time.

Three friends who face strange & scary experiences on their way home on holidays as a result of their malicious intent and actions.

Rahim is a teacher and bilal in Al-Hidayah Mosque. He was assigned by the chairman and chief imam of the mosque, Haji Hanafi to find an invited Imam to lead the terawih prayers in the month of Ramadan. Azmi got the idea to disguise himself as an 'invited Imam'. One day, Azmi realized that he did not deserve to be an imam. Azmi then contacted Rahim. He apologizes and promises to make amends. Rahim told Azmi to redeem by becoming a true imam. In order to atone for his mistakes, Azmi learned to become an imam. Azmi finally began to change and managed to steal the heart of the Imamt's granddaughter in the village.