Tessa knew from childhood that magic existed—as the niece of a witch. And as a sensible person, she preferred to stay away from the Sabbaths. But when the witches get into trouble because of their own mistakes, only those born without magical abilities can help them. To save them, and at the same time the unsuspecting humanity, Tessa goes to a parallel world where cats can talk, Koschey the Immortal solves the problems of his ex-wife, Ivanushka is really no different in intelligence, and Grief lives in a blue bottle.