''KL Gangster'' tells the story of two brothers Malek (Aaron Aziz) and Jai (Ady Putra) who are entrapped in the gangster world. Malek was imprisoned for years due to being betrayed by his own group's masterminded, Shark (Syamsul Yusof) who is a stepchild to the King (Ridzuan Hashim), a leader of the most influential secret societies in KL. For Malek, after his release from prison, he wants to change the perception of life and stay away from the black life as a gangster.