A deadly airborne virus finds its way into the USA and starts killing off people at an epidemic rate. Col. Sam Daniels’ job is to stop the virus spreading from a small town, which must be quarantined, and to prevent an over reaction by the White House.
On July 2, a giant alien mothership enters orbit around Earth and deploys several dozen saucer-shaped ‘destroyer’ spacecraft that quickly lay waste to major cities around the planet. On July 3, the United States conducts a coordinated counterattack that fails. On July 4, a plan is devised to gain access to the interior of the alien mothership in space, in order to plant a nuclear missile.
