The chief of the Special Bureau of the Detective Order, Yakov Svev, is investigating a mysterious case of the death of a group of people due to an accident. However, one of the five dead - a young beauty with black hair and blue eyes - unexpectedly turns out to be alive. Alv Rinholf, as she called herself, is dressed in eighteenth-century fashion, and her jewelry costs a fortune, and she remembers nothing about herself, nor about her life, nor where she came from, nor how she got to the snowy clearing In the woods. However, interrogator Svev happens to know where she came from, although he does not understand what or who she is. Is Alf human? Is she dangerous to others and are those around her dangerous? The search for answers to these questions will take Yakov and Alv to another world, where magic operates and where the heroes of ancient legends live among ordinary people. The adventure begins.