芬兼职当辅警多年，一次因误发告票予正职上司，竟遭对方藉词辞退，幸得好友蔚相助，于一食品公司觅得小主管一职，后更被下属视为偶像。另一方面，辅警队中有新人信加入，态度冷傲，但却非常拼搏，跟随芬工作。一次，信意外枪伤芬好友，令二人起冲突。时芬获悉食品公司新经理上任，而对方竟是信！自此，二人不论在正职或兼职上，都时生磨擦，幸二人经相处后，终成为好友。 　　本与芬有误会的记者晴，亦当上辅警，后更与信成为情侣，令暗恋信的蔚顿感失望。不料，晴被揭发曾为人情妇，更育有一女，大受打击。芬对晴遭遇万分同情，遂不断支持鼓励。后芬竟发现自己爱上晴，究竟晴在信与芬之间，会如何抉择呢？

FUN (Wong Hei) has been an auxiliary policeman for years. By mistake, he issued a ticket to his full-time supervisor and was being fired. Fortunately, he gets a job in a food company of being a supervisor with the help of his friend WAI (Wu Qi Li, Elaine). His new staff admires him very much. On the other hand, there is a new comer SHUN (Lui Chung Yin, Jackie) in the auxiliary police force and works together with FUN. He is cool but very hardworking. Once, SHUN shot FUN’s friend accidentally, which leads conflict between them. Meanwhile, FUN realizes that the new manager of the food company is SHUN. Though both of them have a lot of argument either during full-time or part-time job, they become close friends......