1970年4月26日，郭家的老四郭小洋出生了。三个哥哥对老四疼爱有加，然而，在一次打闹中，老大郭小江却失手用水果刀将老范的儿子大伟直接捅死，郭小江为自己的行为付出了代价。从此，郭范两家也因为这件事结下仇怨。
出狱之后，老大接二连三的经历人生的低谷之后，决定抛弃一切，从头开始，只身远赴草原，找到了自己的幸福。
老二郭小江，从小天不怕地不怕，就怕读书和二小姐裴小云。长大之后的老二，从绿豆芽到羊肉摊，服装厂，股票，电子产品，老二屡战屡败，屡败屡战。他对事业的执着也正如他对二小姐的心意。然而他们俩却一直在错过，老二最终与小薇结婚，小薇临死前希望二小姐能照顾老二。二小姐重新回到老二身边，并决定像以前老二对自己一样对待他和他的儿子。
从小就懂事的老三是郭爸郭妈最看重的儿子，老三也不断用自己的行为去证明自己的认真、勤奋和孝顺。大学毕业顺利分配后，老三便辞去稳定安逸的单位工作，直接投身到股票市场，在师傅引领下，不断进步成长，终于能独当一面。这个时候他又陷入到两段感情中无法抉择。老三的事业与他的爱情一样屡受挫折。所持股票公司的意外失火，让老三一夜之间变得一无所有。在与搭档小鹏一起事业东山再起之时，又一次因为叶琪的原因失去了范荣和婚姻，最终独自前往海南。
老四从小身体不好，患有先天性哮喘，讲话结巴。为了不拖累家庭，老四锻炼自己，苦练绕口令和相声，最终成为一名邮差。老四也因为这份工作，找到了自己的真爱——佳佳。
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