Like many young people, Vitalik Shestakov has always been a rather careless person. And when one day he had the opportunity to return to the past, he was not slow to take advantage of it. But the "butterfly effect" was not long in coming: although Vitalik spent only two days in the past, his life changed forever. When the young man returned back to his time, he realized that he had made a big mistake by interfering with the natural course of fate. Now all he has to do is try to make amends.