In the fall of 2003, Harvard University. Mark Zuckerberg (Jesse Eisenberg), a talented student who was arrogant and unrestrained, was dumped by his girlfriend. In anger, Mark hacked into the school's system by hacking, stole the information of all the beautiful girls in the school, and made a website called "Facemash" for students to rate the hot girls. His move caused a sensation, and at one point, Harvard's server almost collapsed, and Mark was punished by the school. As the saying goes, a blessing in disguise, Mark's move attracted the attention of the Winklevoss brothers, who invited Mark to join the team to jointly build a social networking site. At the same time, Mark also established the "Facebook" that would later become famous. After some efforts, Facebook's reputation grew, and Mark's wealth increased day by day. However, all kinds of troubles and right and wrong followed one after another, and former friends also turned against each other...