You cannot kill someone who is already dead. It is impossible to turn back time if it is broken. You cannot correct the mistakes of those who have already made them. But you need to defeat an enemy who was once defeated and rose from the dead, returned from the past to try to change the present, plunge peaceful reality into chaos and sow evil. Student Oleg Kuprin, who lives on social networks under the nickname Kupol, never liked history as subject and lived life smoothly and easily. Until history itself invaded his destiny. And when they suddenly appeared with hostile intentions, causing death and destruction, he had to defend his city, friends and family. And declare war on strangers...