Maxim Bardin, like many men born under the sign of Libra, is damn charming and, like a magnet, attracts women to him. At one time, his beautiful wife left him with a little daughter in her arms, and for many years now he has been a free bird. That is why his daughter Ariadne, who has great common sense, decides to marry her father. The girl envisions a teacher from her own university, Anna Berezneva, as her stepmother. However, serious circumstances interfere with Ariadne's plans. Berezneva is accused of several murders. It’s good that, by the will of fate, Lady Zodiac, an astrologer-analyst and, by the way, a very impressive woman, intervenes in the investigation...