Aliens arrived a year after the “Battle of Civilizations” and conquered almost the entire Earth in just seven days. But they failed to capture the entire planet. The people resisted fiercely, and the war dragged on for two years. To break this resistance, the aliens come up with an insidious plan and send their saboteur into the past in order to change the history of the Earth. But, as it turned out, this was just a diversionary maneuver, and the real danger for earthlings was completely different.