Set in old rural district, Charlie pretends to be an ALS patient so he can gain sympathy from others. He runs a charity organisation where he secretly carries out all sorts of nasty business. The village chief Fung Yan-bing is a dishonest man who likes to test others with money and take advantage of them. Along comes a beautiful woman named Yu Zan, a materialistic lady who loves money more than anything. However, the woman is carrying the baby of her ex-boyfriend who is a well-known tycoon’s heir. The arrival of the baby will soon change the mentalities and nature of the three problematic human beings.
查理（吴镇宇 饰）是一个假装残疾的骗子，冯仁炳（郑中基 饰）是一个无所事事的村长， 自称恶人的两人对初来村中的美女余真（江疏影 饰）一见倾心。余真因怀孕和前男友反目而出走来到此地，无依无靠之时遂心生妙计，邀查理和阿炳来到家中共度晚餐。酒醉后余真故意让两人误以为与她促成好事导致怀孕，两人上当，难辨谁为亲生父亲，于是共同照顾余真。一日， 两人发现都不是孩子的亲生父亲，于是怒把余真交还给她前男友换取钱财。事成后，二人偶然得知余真前男友想拿孩子做实验，于是查理和阿炳两人念及旧情，决定去营救余真和她即将出世的孩子…