David Vincent knows that The Invaders, alien beings from a dying planet, have arrived to take over the Earth! To make matters worse, the aliens know who he is, and most of the time where he is. Somehow he must convince a disbelieving world that the nightmare has already begun.
When a woman who was found dead after she fell from a horse miraculously turns up alive and the man who discovered her corpse disappears, Vincent investigates.
A vicious dog convinces Vincent aliens are responsible for a friend's recent institutionalization for insanity.
Vincent learns crime syndicate members are searching for extraterrestrials to recover a shipment of stolen narcotics.
A high-ranking general asks Vincent to arrange a meeting with alien leaders to discuss peaceful coexistence.
Vincent has only 24 hours to prove a man recommended for appointment to an important post in the space program is an alien.
Witnessing an alien incineration at a religious shrine, a young woman believes she had a miraculous vision.
Two alien fugitives contact Vincent to ask for his help in stopping the invasion of Earth.
An alien woman arranges to meet Vincent to discuss the possibility of defecting and supplying information, however, fellow invaders are in pursuit determined to silence her...
Vincent is accused of murder after an explosion kills a senator seconds after he delivered a warning about an alien's presence.
