Tania Grott is unlucky. While Sardanapal, Medusa Gorgonova, and other teachers are rebuilding the destroyed magic school of Tibidox, the students are sent home. And so Tania has to return to Moscow to the Durniev family—plus, to take along, as a sort of burden, an entire suitcase full of squabbling ghosts. Well, nothing! During her studies in Tibidox, Tania managed to learn quite a bit, so Uncle German and Aunt Ninel will have a tough time...
And now, at last, it’s time to return to Tibidox. It has been rebuilt, even better than before—except for the Vanishing Floor... Something incredible is happening with it. None of those who dared to enter there have come back. Or did they—after all?