Elena Rudina lives in the impoverished Russian countryside, and there is no food. But then a train arrives in the village, a train carrying a cornucopia of food, untold wealth, and a noble family destined to visit the Tsar in Saint Petersburg--a family that includes Ekaterina, a girl of Elena's age. When the two girls' lives collide, an adventure is set in motion, an escapade that includes mistaken identity, a monk locked in a tower, a prince traveling incognito, and--in a starring role only Gregory Maguire could have conjured--Baba Yaga, witch of Russian folklore, in her ambulatory house perched on chicken legs.