Professor Kronov did not plan to marry, but his relatives had completely different views on this. And curiously, everyone has their own. And then another case threw a secret from the past, an incomprehensible and extremely mysterious stranger appeared on the horizon, a family artifact and even a foreign Mr. H. who has his own interests. In addition, several high-born ladies are very interested in marriage with a young aristocrat. And where does the poor vampire go from all this?