The story spans from 1965 to the early 1970s. Heavily pregnant Zhao Di, the unwanted second wife of an older man, was chased out by her husband's family and forced to return to her own family. She gave birth to a pair of twins, Shun Fatt and Su-mei. As Su-mei had two moles on her face, which was said to be bad luck, she decided to give her up due to the pressure of wanting to build a better life for the rest of her family.

阿坤（李创锐 饰）热爱足球，常与村里的其他孩子一起踢足球。他们期待着能有自己的足球与自己的球鞋。为了参加全国的比赛，他们组织起了村里的足球队。但队中的人互相嫉妒，争吵不断，阿坤他们忍受不了因此退出了。
阿坤不小心把妹妹小芳（郑智允 饰）的鞋子弄丢了，因为家庭困难，兄妹俩都隐瞒父母这件事。当哥哥的阿坤实在找不到妹妹的鞋子，便与妹妹轮流穿着自己的鞋子。阿坤也因为这样常常迟到受到校长的惩罚，他又不想同学们知道他每天迟到的原因。
阿坤坚持每天都练习足球，后来他决定要参加一次越野比赛，希望能得到鞋子作为奖品，要送给妹妹……

A 2006 Singaporean film and the sequel to the 2002 film, I Not Stupid. A satirical comedy, I Not Stupid Too portrays the lives, struggles and adventures of three Singaporean youths - 15-year-old Tom, his 8-year-old brother Jerry and their 15-year-old friend Chengcai - who have a strained relationship with their parents. The film explores the issue of poor parent-child communication.

EM1、EM2、EM3，这几个让人摸不清头脑的数字，实则是新加坡小学的分班制。EM1代表学习最优，EM2代表中等，而EM3则是垫底。小孩们被分到不同的班级，打上了聪明、中庸和笨蛋的标记。这让许多小孩都表示不满。其中，国斌、Terry、文福，这3位来自EM3的小孩则是反抗的最激烈的几个。三个小孩不但志同道合，而他们的家长也有有着这样那样的联系，但是都不怎么友好。
在三位笨小孩无助彷徨时，班上来了位新老师，她的鼓励让小孩们意识到自己并不比别人差。文福等人成绩均有提高。而另一边，三位小孩的家庭也因为患难看到了真情。一切，都朝着好的方向发展着……