On an abandoned forest road, a ufologists' car was subjected to a strange attack by a sparkling ball. Having lost their way from the ski track, Katya and Fedor rush to the car, but it is impossible to help the people in it - they are covered with a layer of ice. The scientists' documents have been destroyed, and only the disk that the guys take with them sheds light on what happened. After reading the secret files, the guys are horrified - in a few days an invasion of alien ships is planned. Their goal is to conquer the Earth...