The plot revolves around the lives of four ex-convicts trying to turn over a new leaf. Ah Hu (Lian), Mad Dog (Lei), Jian Ren (Lim) and Sha Bao (Chin) start a food and beverage business, but their past catches up with them as Ah Hu's teenage son, played by Shawn Ho, gets into trouble for selling drugs.
梁志强宣布将开拍《新兵正传4》，《新4》计划2017年开拍，前面三集的大部分演员都将参与。 梁志强受访时说：“《新兵正传3》反应热烈之后，很多影迷都渴望我们可以尽快开拍《新兵正传4》。“他说第四集将以战备军人为主题，至于属于哪个兵种，他还在与国防部研究，不过大家可以放心的是，不用担心故事会重复，或是与过去三集有相似的地方。
Lin Yu is a boy who is constantly surrounded by misfortune and is always one step behind others. Since primary school, he has a crush on Zhang Qingqing, and continues to pin for her throughout his life. Will Lin Yu, the destined unlucky boy, be able to change his fate