In the book, a student-ethnographer explores the history of one of the most terrible and "savage" sects that existed in Russia before the revolution and in the first years of Soviet power - the sect of Skoptsy. The evolution of their creed, methods of involvement in the sect, life and ethnographic features of the eunuchs, forms of castration, etc. are considered. The texts of sectarian chants and documents on the history of concentration are given. The book contains photographs of castrated sectarians.