2003年秋，哈佛大学。恃才放旷的天才学生马克·扎克伯格（Jesse Eisenberg 饰）被女友甩掉，愤怒之际，马克利用黑客手段入侵了学校的系统，盗取了校内所有漂亮女生的资料，并制作名为“Facemash”的网站供同学们对辣妹评分。他的举动引起了轰动，一度致令哈佛服 务器几近崩溃，马克因此遭到校方的惩罚。正所谓因祸得福，马克的举动引起了温克莱沃斯兄弟的注意，他们邀请马克加入团队，共同建立一个社交网站。与此同时，马克也建立了日后名声大噪的“Facebook”。 　　经过一番努力，Facebook的名气越来越大，马克的财富与日俱增。然而各种麻烦与是非接踵而来，昔日的好友也反目成仇……On a fall night in 2003, Harvard undergrad and computer programming genius Mark Zuckerberg sits down at his computer and heatedly begins working on a new idea. In a fury of blogging and programming, what begins in his dorm room soon becomes a global social network and a revolution in communication. A mere six years and 500 million friends later, Mark Zuckerberg is the youngest billionaire in history... but for this entrepreneur, success leads to both personal and legal complications.