The film takes place in the pre-war years. NKVD captain Frolov is investigating a sabotage at a chemical plant. Suspicion falls on circus performer Erwin Gross. However, the villainous murder of a clown suspends the investigation. It is only with the help of young circus gymnasts that Frolov manages to establish the truth...
Romantic and stormy, full of work, dangers and an irresistible thirst for knowledge was the youth of Al-Hussein ibn Abdallah ibn Al-Hasan ibn Ali ibn Sina, who would become known throughout the world under the name of Avicenna, the great physician, scientist and educator of the 10th-11th centuries.
