A fleet of Martian spacecraft surrounds the world's major cities and all of humanity waits to see if the extraterrestrial visitors have, as they claim, "come in peace." U.S. President James Dale receives assurance from science professor Donald Kessler that the Martians' mission is a friendly one. But when a peaceful exchange ends in the total annihilation of the U.S. Congress, military men call for a full-scale nuclear retaliation.

The life of labor lawyer and dedicated family man Robert Clayton Dean is turned upside down after a chance meeting with a college buddy while holiday shopping. Unbeknownst to Dean, he's just been burdened with a videotape of a congressman's assassination. Hot on the trail of this tape is a ruthless group of National Security Agents commanded by a belligerently ambitious NSA official named Reynolds. Using satellite surveillance, bugs, and other sophisticated snooping devices, the NSA infiltrates every facet of Dean's existence, tracing each physical and digital footprint he leaves while also framing him for murder. With the help of the mysterious Brill, he attempts to throw the NSA off his trail and prove his innocence.