If our world really consists of seven layers, can you pass through all of them? Gusta’s father is sick, and they say only a miracle can help him. And a miracle happens—Gusta meets a mysterious young man who tells her that our world is only one of the layers of the original world. There is a magical sorceress, Inaiya, who walks through the layers into the very last, the Reverse World, capable of saving anyone. All that’s needed is to find the door through which she moves from world to world. The young man is ready to help Gusta find that door—but what will he ask in return?