Sasha, a young computer programmer from Leningrad, is driving north to meet some friends for a nature vacation. He picks up a couple of hitchhikers who persuade him to take a job at the National Institute for the Technology of Witchcraft and Thaumaturgy. The adventures Sasha has in the largely dysfunctional institute involve all sorts of magical beings - a wish-granting fish, a tree mermaid, a cat who can remember only the beginnings of stories, a dream-interpreting sofa, a motorcycle that can zoom into the imagined future, a lazy dog-sized mosquito - along with a variety of wizards (including Merlin), vampires, and officers.