Death Behind a Curtain(1967)

Members of an organised group smuggling heroin from France to Italy send a new shipment of the drug via Sweden, the GDR and Czechoslovakia. A new ballet is about to premiere at the Fibich Theatre in Prague. However, the situation is complicated by a horrific event: prima ballerina Milada Havlová is found dead in her dressing room. The autopsy and the first analyses reveal that she died of a heroin overdose. Captain Chrástek is in charge of the investigation and believes that it is not an accident but murder. An investigation unfolds that reveals not only the strained relationships between the members of the ballet company, but above all an international criminal network...