The world is full of mysteries. And where there are mysteries, the investigators of the Institute of Paranormal Phenomena must intervene. There's no case skeptic David and naive scientist Vojta can't solve. Whether it's an alien abduction of an upstanding citizen of Czechoslovakia, spontaneous self-ignition of a saint in a church or an attack by the creepy goat monster Kozlopír, you can be sure: these two will always find an explanation.