本世纪初，一度被广泛非议的八零后们纷纷走上社会，开始自觉不自觉地扛起属于他们的责任与义务。程锋（陈思成 饰）、吴狄（李晨 饰）和石小猛（张译 饰）是曾在同一所大学就读的好朋友，但是三人的家境却有着天壤之别。程峰家境殷实、帅气潇洒，即使步入社会也不改风流秉性，甚至连好友的女朋友也意欲追求；吴狄善良真诚、待人和善，对友情和爱情都无比看重的他，却因始终未打拼出属于自己的天地而遭到女友杨紫曦（杨幂 饰）的背叛，他的爱情之路崎岖艰难；来自云南农村的石小猛靠着自己的努力总算小有成就，不想却遭遇了巨大的挫折，被迫背叛友情与爱情。每个初出茅庐的年轻人都在面临着人生的重大抉择。 （英语）At the beginning of this century, people born in the 1980s who are once widely criticized are grown-ups now and begin to shoulder responsibilities, whether willingly or not. Cheng Feng (acted by Chen Sicheng), Wu Di (acted by Li Chen) and Shi Xiaomeng (acted by Zhang Yi) are college mates and good friends, but they have very different backgrounds. Cheng Feng is a good-looking playboy from a wealthy family, and he retains his nature after college days, he even tries to chase his best friend's girlfriend. Wu Di is sincere and kind, and holds friendship and love dearly. Unable to build a successful career, he is betrayed by his girlfriend Yang Zixi (acted by Yang Mi) and goes along a rugged path of love. Shi Xiaomeng, who is from the countryside of Yunnan, makes some achievements with his efforts, only to encounter a huge setback, which forces him to betray friendship and love. These young people who have just started life now have major choices to make.