They are not just detectives, they are employees of the Control Service - a special unit for investigating crimes committed... by elves, gnomes, goblins and other representatives of the Small Nations. The work of the Investigative Committee is complicated by the fact that these same representatives wear disguises that make them indistinguishable from ordinary people. Try to catch a criminal who can change his appearance at will, and even strives to send all the demons of hell to his pursuers... But the Investigative Committee officers can cope, because they are also not entirely human...