Nuclear Physicist, Bob Lazar shatters the cloak of secrecy surrounding the government's most highly sensitive operations located at an area known as S4 of Area 51 in the Nevada Air Force Range. Lazar gives a full account of Alien spacecraft the Government has hidden at S4 as well as details on their propulsion systems and how they operate. Bob Lazar was part of the reverse-engineering team. As part of this team his job was to understand and attempt to duplicate the propulsion systems of these craft. This film presents the details of his research.