Hungarian physicist Leo Szilard leaves Europe, eventually arriving in the United States. With the help of Einstein, he persuades the government to build an atomic bomb. The project is given to no-nonsense Gen. Leslie Groves who selects physicist J. Robert Oppenheimer to head the Los Alamos Laboratory in New Mexico, where the bomb is built. As World War II draws to a close, Szilard has second thoughts about atomic weapons, and policy makers debate how and when to use the bomb.
As Kevin Flynn searches for proof that he invented a hit video game, he is 'digitalized' by a laser and finds himself inside 'The Grid', where programs suffer under the tyrannical rule of the Master Control Program (MCP). With the help of a security program called 'TRON', Flynn seeks to free The Grid from the MCP.