2003 autumn a night, at harvard's department of psychology student mark, zack sulzberger (Jessie, eisenberg).shebeginstofall in front of his computer sat down and began to very enthusiastic conception of one new idea: for the former rejected Microsoft 1000000 work and committed to college for little genius and there is nothing better than his moment of brain plan more exciting: mark to be a include global all his website, to everyone in the above work, study and entertainment, making friends... His roommate, Edward, sarven (Andrew Garfield diggs) although think the mark ideas too crazy and unrealistic, but given before the invasion of the school network mark hacker behavior "great", Edward finally decided and mark together, design this extremely large web sites.