In the Iron City it is cold and smells of rusty metal, and behind the heavy gates on the far approaches there is a deadly Darkness. Trains, in which no one travels, come from nowhere and go to nowhere, and it is forbidden to even look at them, so as not to bring trouble to the City - not to invite Darkness into it. But is it possible to forbid dreaming? A girl, whose house is full of books, thinks that there, beyond the borders of the frozen Iron City, there is not Darkness and Death, but Light and Warmth: a big beautiful world... One day she will dare to check it out.