It’s pleasant to stay in the Russian backwoods with the world-famous artist Bulavin! Fresh rural air, exquisite table, good drinks, conversations about high art… Colonel Gurov couldn’t even dream of such rest. But what happened all of a sudden? Why, at the artist’s estate, strange—and sometimes inexplicable and dangerous—events began happening without any visible reason? Mysterious shadows in the garden, a stone gravestone in the cemetery with the name of artist Bulavin carved on it—these are only the first traces of someone’s nasty joke. The brave MUR colonel hasn’t had to deal with incorporeal filth before, but he knows well that every bit of “unclean” comes from something very earthly…