Another story of a person who is transported into the past. Only this one knows that, according to Novikov’s self-consistency principle, you can’t change history. But what should he do then, if he has only a year to live, because after a year the little tsar, whose body he has been thrown into, is supposed to die? History can’t be changed—it takes into account that you’ve ended up in it, or can it still be changed? But even if it can’t, that doesn’t mean the hero won’t try to do it, because the task in front of him seems, at least, simple: not to save the world and not to get into innovations, but only to stay alive for a year.