Impostor

In 2079, Earth is in a forty-five-year war with Alpha Centauri and most of the human survivors live in cities that are protected by force field domes. The weapon engineer Spencer Olham has lost his father in the war with the Centaurians that have not been seen by humans, and is happily married with Dr. Maya Olham, who works in the emergency of a hospital. His best friend is Nelson Gittes, who works with him in a top-secret facility. When the Earth Chancellor is ready to visit the city where Spencer lives, he is arrested by Major Hathaway from the Earth Security Administration accused of being an alien replicant. Hathaway has intercepted a Centaurian transmission telling that the real Spencer was murdered and replaced by a replicant with U-bomb in his chest ready to blow-up when he is close to the Chancellor. However Spencer succeeds to flee from Hathaway and now he wants to prove that he is not an alien replicant. But the Major and his men are hunting him down.