It would seem, what relation does an ordinary St. Petersburg girl have to the ancient Scythians? And what about the golden royal crown that belonged to their lords and was lost overnight? But it is Lena Drozdova who approaches the secret of the unique exhibit... And mysterious and terrible events happen to her. A former classmate invites her to her place for a holiday, from where Drozdova is forced to run away and get into the car of an unfamiliar man, who simply disappears halfway there. And to get home, Lena steals his car along with all its contents. And in the driver’s jacket pocket the girl finds a strange postcard...