Tanya Grotter, Grobynya, Vanka Valyalkin, Gunya Glomov, Yagun and Shurasik find themselves in a parallel world. The forests of this eerie world are inhabited by undead, and the mountains and dungeons are inhabited by spirits. It is ruled by four elements: fire, water, air and earth, to which all magicians living in this world are subordinate. No one is able to use the magic of an element other than the one that gives him strength. The Elemental One, an ethereal creature whose powers are tens of times greater than those of an ordinary sorcerer, invisibly rules here. Once upon a time, the Element was transferred here by the magic of Theophilus Grotter. Once Tanya's ancestor took advantage of the help of Stichiarius, but, considering the price set to be excessive, he broke the contract and, without paying it off, cunningly transferred Stichiarius to a parallel world. In order to leave it and return to his own dimension, the Elemental One needs to water the runes of his cup with the blood of Theophilus Grotter, which now runs in the only veins - the veins of Tanya Grotter...