大学毕业生天翔（张学友 饰）出身贫寒，其父猜叔（董骠 饰）靠在榕树头卖唱养活天翔以及年幼的一子一女，天翔不愿父亲在市场唱黄色小曲挣钱，但无奈工资微薄，只得在同事的侧目中忍受。天翔在工作中踏实肯干，在好友大傻（刘青云 饰）的帮助下为公司立下功劳，同时大老板的妹妹比蒂（周海媚 饰）对天翔也颇为有意，二人感情渐浓之际，大老板却因天翔一家的地位低下而中断了这段姻缘，天翔只得从相邻的舞女周枫（张曼玉 饰）处获得情感慰藉。失去工作的天翔加入黑道团伙，与大傻一起同另一势力高佬森连番拼杀，高佬森一伙将大傻和周枫害死，天翔向高佬森寻仇之际，猜叔为保全儿子挺身而出……

Ip Cheung and her husband, a senior police inspector, had been happily married for 18 years. One day, Ip runs into her neighbour, a Taiwanese woman. As they are talking, three men suddenly appeared and tried to kill them. The Taiwanese woman is killed but Ip and the kid, Yen, managed to escape. At the same time, Ip's husband commits suicide. His superior suspected him of corruption. Ip finds out that the Taiwanese woman was her husband's mistress and Yen, his illegitimate son. Ip is given custody of Yen but they are unable to get along. However she will save his live when the gang go after him.

飞叔移民到加拿大与儿子哈哈一起生活。在飞机上认识了一位来自大陆的黄艳秋，并有意撮合艳秋和哈哈，飞叔与艳秋的姨妈是一对欢喜冤家，艳秋和一个富家花花公子一起，哈哈很沮丧，飞叔鼓励儿子向艳秋表白。哈哈买下一块地，想转头赚钱，但买家临时改变主意，令哈哈欠下一笔钱，飞叔、姨妈、哈哈、艳秋开始了四人新世界……