In 1989, Kevin Flynn, an innovative software engineer and the CEO of ENCOM International, disappears. Twenty years later, his son, Sam, is visited by Kevin's friend and ENCOM executive Alan Bradley, who urges Sam to investigate a mysterious page from Flynn's old arcade that may lead to information regarding Kevin's whereabouts. While exploring the arcade, Sam discovers a concealed computer laboratory and unintentionally transports himself to The Grid, where he finds an evil digital reprentation of his long lost father, named Chu. Now Sam must defeat Chu to save himself and his real father.