When Sophie and Claire found themselves at their grandmother's old estate, they expected anything but this. In one of the fireplaces, the girls found a staircase that led them... to a magical world! But this world turned out to be inhospitable - the sisters were immediately attacked by a terrible ghost, from which they barely managed to escape. Timid Claire hoped to never again climb the fireplace ladder and see that strange place. But when Sophie goes missing one night, Claire is left with no choice. And now she must find her sister in an amazing but cruel world, where people can perform miracles, but do not trust each other, and where beautiful unicorns used to live, but now they live only in old legends. Will Claire find the strength and courage to find and save her sister, or will she lose Sophie... again?