Director:
Cast:
Sam Hui / Sam Hui / Sam Hui || Zhiwen's younger brother Zhixin (Xu Guanying) is a genius inventor. He recently invented a laughing machine that can make people laugh endlessly. Just when Zhiwen was getting by / another TV station asked him to be a guest host. Zhiwen was confident and brought his brother's new invention to the party. Zhiwen's hard work and the power of the laugh machine made everyone present laugh. The effect of the show exceeded expectations. Therefore / the TV station promised Zhiwen a high salary to recruit him. Zhiwen also wanted to leave / but he had no choice but to sign an eight-year contract of sale with his original TV station. If he broke the contract / he would have to pay huge compensation. One night / the two brothers sneaked into the vault of the television station and tried to steal the deed of betrayal...
志文（许冠文 饰）是电视台一名跑龙套，自认为很有才华，所以一直郁郁不得志。志文的弟弟志新（许冠英 饰）是一个天才发明家，最近他发明了一部笑弹机，能让人大笑不止。正当志文得过且过之时，另外一家电视台请他去客窜一回主持，志文信心十足、带着弟弟的新发明前往晚会现场，志文的卖力 表演和笑弹机的威力令在场的所有人都大笑不已，节目的效果超过了预期。于是，这家电视台许诺高薪想挖志文过来。志文也十分想走，无奈自己