In distant space there is a highly developed civilization of intellectuals, which has long ceased wars and defeated all diseases that once raged in the galaxy Ammavaru. The most devastating was the last epidemic caused by the virus X. The virus excited wild aggression in its carriers. Because of him, a total war began, which almost destroyed the galaxy. A thousand years have passed. It was believed that the dangerous virus had long been destroyed and the Ammavaru galaxy lives in complete harmony, forgetting about wars and diseases. But once a distant space scout accidentally discovered a planet on which this virus still exists in huge concentration. Space is in danger again. The government sends another scout there to find out if it is possible to cure the inhabitants, or it is worth immediately destroying the planet until the virus has spread again. The planet is called Earth. And its northern part, where the scout landed his ship, Russia. The alien comes into contact with several representatives of earthlings and gives them unlimited opportunities. Together they begin to secretly treat the Earth for the X virus. But you just can't get rid of it. Infected carriers launch a counterattack across the planet. The results are unpredictable.