Professor Dimov is a diplomat who has been recruited as a spy by a foreign intelligence service. The suspicions fall on Dr. Belcheva. Major Kalinov is entrusted with the investigation of the case. He learns that she is Dimov's mistress. Paris, France. Dimov and Belcheva go out leaving a bag with secret documents in Belcheva's hotel room. Kalinov manages to retrieve the documents. After this incident Belcheva dies in hospital from poisoning. On board the plane Kalinov exposes the professor as a spy. Bulgarian counterintelligence officers arrest him.

Cast

Nevena Kokanova

Bogomil Simeonov

Georgi Cherkelov

Petar Slabakov

Vessela Radojeva

Svetoslav Peev

Naicho Petrov

Preslav Petrov

Lyubomir Kiselichki

Georgi Dzhubrilov