One day, five inseparable friends gathered in the apartment of the famous archaeologist Shtukin, the grandfather of a guy nicknamed Don Juan. And somehow it happened by chance that an ancient jug broke, from which the warlike ghost of the formidable leader of the Huns, Attila, immediately broke free. The ancient spirit was so furious that a little more, and a nuclear war would have started. And although all five guys are smart and quick-witted, they cannot cope with the terrible nightmare. Therefore, Professor Phantomov, a specialist in anomalous phenomena, comes to the aid of the guys...