Centrum. The central world of the universe, surrounded by petals of other worlds, including our Earth. Centrum was once great and strong, but disaster threw it back into the past. Here, at the crossroads of thousands and thousands of civilizations, the Border Guard Corps is on duty, guarding the borders between worlds... The coastal state of Javal, rich, lazy and sleepy in the south, does not like changes - and why should they, if a comfortable and calm life is already so beautiful? However, it is in the steppes of Djaval that a complex multi-step operation begins, in which a variety of players are involved - from the intelligence services of Clondal and Surgan to smugglers, bandits and representatives of the border guards. However, the main figure, quite unexpectedly, becomes the young computer scientist Kostya Stepanov, who decided to earn extra money as a simple porter for merchants...