IM NOT GANGSTER follows Ah Loong, an ordinary young man working at a convenience store. In life, no one notices him. He is constantly ignored and looked down on, as if he were invisible. One night, he accidentally saves the life of Hao Lian, the boss of the gang "Yi Qi". Before Hao Lian dies, he passes Ah Loong the key items and codes that make him the next leader. Just like that, Ah Loong, a complete nobody, suddenly becomes the head of a crime syndicate.