In this story, Alisa and her father, Professor Seleznyov, are traveling through space in the year 2087. While going to meet an alien archaeologist, they discover an abandoned spaceship, which turns out to be the long lost, legendary Black Wanderer ship.
When the examine the ship, they find papers which describe how the old ship’s crew left a purple ball on earth, in which a devastating virus is stored. Terribly, the purple ball is set to explode in ten days. Then, it would release the virus which would cause the people of earth to destroy one another.
And so, Alice and her comrades set off in a time machine. They travel to the distant past – 26,000 years ago, when magic and dragons existed. All to find and destroy that devastating purple ball.