事情缘起于傻仔丁常旺，旺本是豪门富商包庆丰九代单传的独子，旺母本是包老爷的妾侍，因原配夫人妒忌，诬捏旺母与家朴有染，包老爷盛怒之下，视有了身孕的旺母是怀有孽种，把旺母逐出家门，旺母流落异乡并诞下旺，两母子过了二十几年相依为命的艰苦生活。而包老爷二十多年来仍无子嗣，直至原配夫人患病去迦后，包老爷有感膝下无子承继家产，遂派亲侄包大业往寻旺两母子，知不寻获，包老爷宁愿临老续娶求子，也不会把家业传给亲侄。大业一直欲承继包老爷家产，如今希望幻灭，遂起歪心，在寻到旺两母子时，暗中加害之，旺母死，旺被打伤后脑滚下山崖。业以为旺已死，即找来一个身份卑贱的孤儿，顶包假冒包老爷之子，改名为包继宗。大业并编造故事，令继宗亦以为自己就是流落在外的包家少爷。

Square Pegs was a Hong Kong television series 2003. The program's title is an abbreviated reference to the English idiomatic phrase "square peg in a round hole."

The series was the runaway success of 2003, commanding a viewership of 3.5 million or roughly half of Hong Kong's population during the last week of its broadcast, and breaking TVB's ten-year ratings record. It also went on to win four awards for its two lead actors in the TVB 36th Anniversary Awards, and made both Roger Kwok and Jessica Hsuan household names in the territory.